🔍 牛津詞典
🔍 朗文詞典
🔍 劍橋詞典
🔍 柯林斯詞典
🔍 麥美倫詞典
🔍 韋氏詞典 🎯
檢索以下詞典：
(Mr. Ng 不推薦使用 Google 翻譯！)
最近搜尋：
- Vacuum 146
- fuel 604
- encore 142
- hard rock 63
- investable 32
- trumpet 719
- laughingstock 64
- handy 503
- reposeful 43
- appeals 44
- classes 51
- Chances are 74
- union 541
- Triumph 67
- mambo 83
- graphical 86
- portsmouth 70
- nobly 46
- breach of the peace 67
- unfitly 27
- temperance 174
- haircutting 42
- procrustean 34
- rosary 75
- animate 150
- supt 44
- mackenzie 47
- legitimatize 53
- paramour 79
- tackling 130
- profanity 79
- twelver 39
- at bat 101
- eagle 523
- grenada 74
- purlieu 71
- epidemic 209
- toffies 32
- equation 472
- stopcock 52
- Rate 168
- palestinian 42
- tighten 301
- hostelling 29
- soapiest 30
- testimonies 31
- wykehamist 38
- Intake 90
- wedding 479
- rhenium 34
- upcoming 226
- madrigal 87
- characterization 126
- reckon 177
- genuine 466
- leaky 99
- expire 201
- infernal 56
- crack 537
- shekel 85
- don 159
- olive branch 72
- Scan 68
- Ff 92
- lacy 82
- cotton wool 112
- shrewish 60
- inadequacies 33
- hesitative 35
- totes 53
- colonialism 129
- paradigm shift 57
- secessionist 65
- commute 189
- tl 78
- Far East 125
- Orthodontic 6
- route 586
- after-party 59
- pdq 88
- cockieleekie 68
- kilovoltage 33
- great britain 41
- spottier 29
- surrounded 32
- tunisian 41
- laying 35
- characteristics 58
- groundsel 42
- poker faced 43
- haughtiness 102
- chopped 77
- sue 161
- suspicion 505
- too close to call 51
- upmarket 134
- making 81
- yaw 70
- ply 239
- shimmy 98
- federalist 130
- shag 88
- tyler 47
- boron 84
- user 500
- scarf 514
- trihedron 42
- strip 654
- Physiotherapist 35
- sludgiest 32
- woodland 174
- scare 468
- recruit 618
- affectless 99
- ad 571
- screechy 50
- feng shui 95
- desperation 290
- do-it-yourself 99
- pillaging 49
- weightier 38
- Brunt 145
- westmorland 37
- top-down 49
- contort 136
- gushy 62
- nickelic 48
- playless 34
- hoteldom 33
- get around 155
- kingly 76
- inspire 408
- plastic 2185
- atrophies 52
- scottish 48
- wv 73
- bauhaus 58
- discourage 583
- twopenny 46
- unfunniest 37
- brushless 84
- sclc 37
- relies 26
- ringed 55
- disbarring 32
- pizza 79
- kindergarten 98
- raja 99
- christchurch 41
- contraindicated 50
- shamming 30
- blubbery 75
- raylet 42
- tomfoolery 61
- whooper 41
- cheery 132
- racily 42
- telic 44
- audiogram 34
- al dente 107
- mean 400
- themed 79
- shticky 27
- acmic 52
- short-lived 98
- scrawny 72
- executive privilege 82
- poke 488
- insularize 39
- apres-ski 45
- hibernal 52
- mischancy 38
- rindy 41
- samarium 49
- rootle 48
- trumperies 26
- guideline 249
- race car 57
- steer clear 17
- tempeh 50
- cockyleekie 42
- woebegoneness 33
- ellipse 115
- way 476
- declamations 44
- on the way 34
- millenarianism 36
- rode 60
- reprocess 150
- man up 63
- maximize 220
- wilt 219
- rainwear 37
- antipersonnel 64
- unrelievable 37
- macerate 51
- colophon 34
- envy 489
- misapprehend 45
- soubriquet 48
- albatross 102
- gum tree 100
- bionic 100
- appalling 186
- bioenergy 45
- chum 145
- good 557
- littoral 58
- dry-rot 60
- York 76
- inertia 262
- preshow 34
- synapsis 44
- primacy 74
- goog 47
- strangle 327
- cretinous 62
- remote 1524
- penny whistle 62
- lima 56
- secondaries 29
- barken 37
- Embassy 226
- upwind 56
- unpoised 32
- nextly 37
- afara 88
- criterium 35
- strut 120
- foamy 119
- pledger 30
- ceremony 546
- spit 433
- gullah 39
- selenide 41
- stumbly 37
- shown off 34
- snuck 55
- provenance 62
- sunglass 66
- forewarm 5
- lease 123
- lush 157
- Reuter 87
- quarterback 83
- protective 457
- claymore 42
- vassalry 37
- voodooism 39
- radiancy 58
- dogmaticalness 51
- Czech 67
- noble 464
- ruinate 45
- ruralism 40
- superimposed 33
- Jettison 25
- hawkishness 33
- recesses 33
- joystick 57
- obstructer 34
- monterey 46
- misapprehension 55
- mill 543
- council of war 75
- reawaken 59
- whistleable 33
- joker 200
- spotty 98
- codify 159
- taper 147
- brain trust 73
- sword 525
- limited partner 38
- ugli 44
- biostatistics 37
- overcritical 38
- Go in for 42
- rescue 520
- unregistered 68
- upstream 63
- reverse mortgage 8
- socialising 50
- umbilici 33
- Liverpool 42
- tension 507
- epiphany 109
- leer 68
- excretory 72
- vhf 60
- run into 66
- flavoury 26
- codpiece 72
- reveler 199
- IDE 52
- suck 578
- foxhunting 83
- unfollow 42
- misgovernance 37
- out-of-sight 20
- ran out 33
- mousseline 39
- maltose 46
- closed shop 82
- spellbindingly 30
- cohabitant 46
- represser 44
- lexis 52
- Paper clip 49
- testifies 32
- ely 40
- wriest 42
- self-respect 92
- undo 563
- stockist 53
- solidarity 203
- stingy 137
- flabby 184
- geriatric 175
- crocus 103
- tannin 56
- evident 468
- lawn mower 59
- chloridize 40
- paternalism 77
- tottery 47
- femme 91
- -ion 34
- once 267
- class-conscious 98
- repression 185
- assembly-line 68
- Porous 105
- scrubbing 28
- by your own account 42
- hark 70
- mark off 38
- git-go 65
- troubling 63
- virtuoso 56
- tendinitis 47
- vdu 47
- trawlermen 27
- infomercial 66
- caledonian 65
- mask 556
- mussel 80
- baronetcy 128
- cybersex 74
- piñata 64
- stagger 284
- restrictionism 40
- and that 71
- bilateral symmetry 47
- One of a kind 37
- Decoction 18
- put sb in the shade 33
- unloose 51
- amputation 44
- topping 120
- do-it-yourselfer 64
- yaws 42
- antifa 45
- spanish 52
- plantlet 40
- nanny 223
- fly in the face of 36
- subtract 467
- Dismissive 57
- gaboon 41
- staircase 515
- Marketing 122
- Trotskyite 29
- newsiest 31
- opportunity 579
- cottage industry 118
- homelike 47
- topos 43
- bff 75
- sinkage 39
- AM 93
- spindly 106
- tough love 104
- uncharacteristic 125
- starve 571
- Sephardi 43
- styli 29
- dyadically 31
- carnelian 58
- sidestepped 29
- vorticism 41
- pwn 44
- lumbago 69
- cyanide 124
- talc 56
- exemplifies 43
- community center 89
- sap 352
- unwonted 62
- homozygous 53
- legionary 66
- bopping 39
- truthy 43
- sticky 559
- toolmaker 58
- ambulance chaser 53
- Open-mouthed 41
- touts 64
- practicum 111
- allegory 135
- moldova 57
- wooziest 33
- fontanel 50
- tackle 309
- facial 184
- naff 73
- wherefor 36
- levees 32
- shadowily 32
- preprogram 43
- venezuela 63
- axled 51
- placeable 31
- conglomerate 258
- stintedness 39
- indecent exposure 98
- recapitulation 51
- shapely 210
- beggar-thy-neighbor 63
- panoplies 34
- describe 542
- verso 51
- Goody Two-shoes 83
- Macao 78
- misname 82
- dope up 79
- unexpired 52
- silken 60
- tss 62
- hays 61
- coquet 50
- credential 237
- prankish 52
- ore 493
- Snub 21
- hormone 158
- matterful 44
- richly 66
- unfriendly 285
- semestrial 30
- courteously 41
- tunnelling 33
- sexualize 42
- Ethiopia 68
- NUS 59
- shadier 33
- wittiest 30
- spankingly 41
- liberalities 32
- dyadic 46
- stagy 183
- whetting 29
- offcut 62
- unrelative 36
- panier 27
- scrum 90
- schoolmarm 58
- skyscraper 308
- zillion 76
- spaceman 68
- long jump 97
- left field 63
- decenter 38
- resemblant 40
- prize 618
- holies 32
- Tunisia 53
- pigheaded 51
- Approbate 53
- vary 551
- piety 88
- Iraq 95
- teeming 48
- jury 492
- get back at (someone) 7
- vendee 39
- Close call 16
- confront 274
- retiring 69
- vitriolled 27
- Initiatives 55
- swig 123
- paris 48
- quantities 41
- recognise 165
- fit up 95
- bigness 65
- Britain 106
- Sukkoth 40
- insufferable 68
corundum
noun
co·run·dum kə-ˈrən-dəm 
: a very hard mineral that consists of aluminum oxide occurring in massive and crystalline forms, that can be synthesized, and that is used for gemstones (such as ruby and sapphire) and as an abrasive
Example Sentences
Recent Examples on the Web According to a new study, the night side is cold enough to form metal clouds of iron and corundum. 
Joshua Hawkins, BGR, 25 Feb. 2022 The temperature differences between the two sides of the planet also mean that the nightside is cool enough for metal clouds made of iron and corundum to form. Ashley Strickland, CNN, 21 Feb. 2022 Known for their red color, rubies are part of the corundum family of gemstones, which are gems that are compact and dense, according to the International Gem Society. Jordan Mendoza, USA TODAY, 27 Oct. 2021 Left side: 31 round diamonds, blue corundum stone and bricks and ivy silhouette. Kori Rumore, chicagotribune.com, 18 Oct. 2021 With a Mohs hardness score just a point shy of diamond’s, corundum becomes a red ruby through the timely addition of chromium atoms. Natalie Angier, New York Times, 11 Dec. 2017 After all, sapphires and rubies are built of the same basic mineral, corundum, a crystallized collaboration of aluminum and oxygen that would be transparent and colorless if not for some artful chemical doping. Natalie Angier, New York Times, 11 Dec. 2017 See More
Joshua Hawkins, BGR, 25 Feb. 2022 The temperature differences between the two sides of the planet also mean that the nightside is cool enough for metal clouds made of iron and corundum to form. Ashley Strickland, CNN, 21 Feb. 2022 Known for their red color, rubies are part of the corundum family of gemstones, which are gems that are compact and dense, according to the International Gem Society. Jordan Mendoza, USA TODAY, 27 Oct. 2021 Left side: 31 round diamonds, blue corundum stone and bricks and ivy silhouette. Kori Rumore, chicagotribune.com, 18 Oct. 2021 With a Mohs hardness score just a point shy of diamond’s, corundum becomes a red ruby through the timely addition of chromium atoms. Natalie Angier, New York Times, 11 Dec. 2017 After all, sapphires and rubies are built of the same basic mineral, corundum, a crystallized collaboration of aluminum and oxygen that would be transparent and colorless if not for some artful chemical doping. Natalie Angier, New York Times, 11 Dec. 2017 See More Word History
Etymology
Tamil kuruntam; akin to Sanskrit kuruvinda ruby
First Known Use
1804, in the meaning defined above
Time Traveler
The first known use of corundum was in 1804 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
切換為繁體中文