🔍 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：
- baluchi 27
- limiest 27
- take in 204
- blameless 194
- Received 173
- infantilize 55
- dumdum 82
- swipe 261
- hippiness 33
- lotus 71
- spiritual 467
- antepenult 39
- Antics 138
- wobbling 34
- Finance 285
- esoteric 108
- weapon 563
- gamy 170
- mistrust 92
- jointless 38
- octave 71
- opalescently 30
- contempt of court 59
- outgrowth 202
- relate 561
- fortune-teller 90
- waterborne 71
- mob 265
- Nepal 104
- browbeat 126
- metamorphic 51
- carcass 109
- ownerless 56
- connexion 68
- Button 175
- enervate 114
- monomer 45
- straight and narrow 58
- gymnastics 193
- liquidizer 40
- gutsily 44
- hardily 30
- Old 138
- fuel injection 100
- costermonger 105
- odyssey 56
- Burying 37
- painterly 76
- flourless 56
- Funeral 181
- balance of payments 125
- opt in 59
- dress down 122
- refreshed 137
- hostage 157
- overlook 556
- prophet 77
- Develop 426
- imperial 162
- stately 213
- HUMID 90
- beach ball 107
- deterrable 40
- coffee bar 100
- omani 49
- Waddle 75
- huntress 61
- Orangeman 42
- Outlying 321
- pull 313
- utopia 73
- honorable 249
- hand job 50
- ostrichlike 33
- urban sprawl 35
- Understand 132
- unprotected 47
- perpetual 216
- strollers 39
- food bank 99
- answering machine 91
- emissaries 47
- Balochi 44
- selecting 38
- stapler 64
- deliver the goods 43
- fanatic 270
- heroics 41
- rejoicingly 34
- Estonia 99
- at large 66
- Lubricate 58
- electrics 54
- service 282
- extend 529
- adventures 60
- rioting 129
- jinni 77
- Niggle 50
- taciturn 84
- finland 75
- unrestrained 172
- immobilizer 53
- canal 492
- Allegiance 175
- terrifying 84
- compete 520
- Also 109
- Comprehensive 229
- ATHLETE 201
- half-price 82
- variegated 54
- rustle 281
- unanimity 48
- camouflage 157
- Hallmark 110
- free time 75
- abraham 43
- boom and bust 10
- web 149
- gismo 50
- mechanize 82
- foreshore 67
- maharani 63
- intonation 72
- perception 204
- Mrs. 77
- Verb 115
- screw up 90
- ageist 91
- complex 610
- Original 166
- paeony 40
- mum 86
- dis 153
- Drops 55
- synesthete 33
- patchier 34
- unable 607
- Imbue 69
- needle 556
- stud 424
- Goat 174
- legroom 160
- festivities 103
- good afternoon 88
- gut 388
- a matter of principle 19
- matrimony 185
- illuminative 59
- emergency room 102
- precedent 89
- carnivorous 165
- take advantage of 80
- weatherproof 74
- animal 287
- Dark 142
- dispatch 223
- gout 123
- burr 231
- millimetre 326
- impanel 69
- ro 83
- whitening 47
- Findlay 39
- shipboard 67
- additionally 186
- gifted 132
- falling-out 104
- Let 122
- totalities 27
- delicacy 161
- conceptualist 173
- paunchy 228
- cagey 130
- caretake 51
- dine on 88
- half-moon 88
- reveler 195
- though 251
- attribute 570
- damp course 69
- hunting ground 58
- empathize 98
- detachably 50
- Spend 291
- Jockey 129
- anti 140
- effing 65
- ghost story 95
- gentlewoman 124
- guyana 63
- statement 519
- pasturage 49
- free and easy 95
- preeminently 37
- proverb 155
- abiotic 59
- coupler 58
- bitumen 99
- circulation 204
- air rifle 90
- INFECT 104
- hustle 197
- vegan 153
- giblets 80
- oxymora 29
- carjacking 125
- mythology 99
- objectionable 63
- headbanger 41
- netherworld 67
- coeducation 91
- features 70
- Table 192
- vigour 101
- betray 459
- Monarch 227
- embarrassing 186
- Reflective 256
- nevers 33
- fishier 45
- Poem 102
- vermin 91
- daydreaming 44
- balance of power 134
- stardom 80
- ACCESSIBILITY 58
- control tower 80
- AZT 94
- flummery 53
- dynamite 133
- Can 201
- before long 72
- busman's holiday 95
- inescapable 100
- gunrunner 87
- guy 887
- supplant 102
- Impervious 133
- multitask 41
- poverty-stricken 78
- clear up 74
- ahead 129
- prefabricate 40
- undeserving 87
- videoconference 52
- continuance 115
- casual 489
- OD 75
- midwife 86
- Stuffy 155
- bodega 52
- BEAT 155
- biochemistry 100
- suffer 574
- literati 163
- jointer 34
- profundity 66
- commute 181
- legalization 52
- couple 524
- gent 142
- pendulous 52
- petition 279
- immoral 231
- april 116
- nimble 100
- inter 200
- concord 116
- Hereafter 162
- smudgy 114
- minimum 520
- at hand 88
- aardvark 103
- come in for 88
- dropping 134
- courageous 241
- moiety 50
- bring 237
- hour 251
- Cables 31
- crowd in 90
- Sedan 25
- Psychology 245
- passenger seat 73
- lionlike 32
- papilloma 50
- subsidise 132
- neighborhood 512
- pergola 52
- a cappella 57
- hotheaded 35
- Ojibwa 38
- dependable 240
- legalize 87
- nonchalant 73
- catacombs 48
- halal 122
- hatcheck 43
- bartend 76
- bracelet 131
- karma 116
- midterm 62
- quit 555
- implausible 98
- undoubted 278
- bourgeois 117
- oval 502
- Designate 208
- bar graph 92
- paraplegia 61
- cornrow 67
- Moral 250
- CAtholic 24
- archival 120
- PRESS 114
- argot 129
- christen 108
- tlc 59
- testosterone 70
- fault 595
- pathogenesis 48
- bolshie 129
- wilts 31
- good-looking 118
- resin 80
- hereness 36
- revisit 259
- pleat 112
- fair play 127
- whiten 97
- clothing 518
- Parallel 247
- knaveries 29
- divorcé 219
- tied 59
- agent 576
- cooler 109
- incorporable 35
- stratford-upon-avon 34
- Undoubtedly 152
- honorarium 64
- iguana 62
- humpback whale 68
- honor 323
- Euthanasia 81
- handiest 32
- grieve 506
- Could 107
- tiny 538
- nudist 58
- magnesium 55
- fen 190
- fretful 105
- ghoul 98
- nibs 61
- book value 127
- fatherless 71
- unveiled 48
- assassinate 150
- troubadour 80
- overmanning 34
- lighten 480
- corporal punishment 86
- obsessed 90
- butterfat 102
- imbalance 124
- erin 51
- terror 549
- disadvantageous 113
- ascension 177
- everyday 512
- carbonate 105
- go against 89
- franchisor 89
- acknowledgements 51
- scaly 111
- underutilize 36
- log on 63
- cooperative 228
- flatline 72
- indecency 224
- chat up 95
- highfalutin 90
- humanistic 49
- Winner takes all 16
- Dosage 133
- god-given 68
- crudely 85
- jujitsu 46
- dinosaurian 44
- impi 51
- keelhaul 41
- overhasty 48
- famously 194
- super duper 62
- cram 178
- foyer 202
- Slit 49
- vehicular 59
- Implement 203
- aftertaste 110
- attract 496
- unavailable 189
- linemen 31
- filter tip 81
- blind alley 113
- overstaffing 29
- linker 34
- chaise longue 127
- deck shoe 79
- petal 103
- apiary 94
- tights 77
- nepal 94
- hands on 27
- athletic 226
- eye shadow 102
- tremolo 61
- floatation 78
- get into 78
- intersperse 127
- Boxing Day 96
- frond 95
- knottiest 29
- Strategy 193
- stargazing 63
- inflation 234
- homeless 293
- goat 512
- yesterday 92
- montenegrin 41
- superior 523
- untainted 65
- For good 44
- gift wrap 96
- Alcohol 158
- cambridge 65
- SARCASTIC 97
- holographic 43
- least 418
- family tree 93
- CBS 34
- chapless 34
- close off 100
- Far 189
- dpi 84
- boo-hoo 51
- more 342
- delinquent 145
- Addicted 154
- Al 98
- bleary 204
- freshwater 115
- valid 519
- eurocrat 73
- caustic soda 81
- press-gang 38
- help 266
- DISCIPLINE 93
- refusal 569
- invariable 47
- incubator 109
- Brusque 31
- gunsmith 126
- outsider 252
- baggiest 52
- Ruminate 21
- doxing 48
- boxers 53
- far-off 119
- empathise 83
- B 122
- flower power 91
- reformatory 57
- Spearhead 86
- meddlesome 48
- Slacker 159
- instabilities 29
- Lipstick 124
- justiciable 45
- benelux 84
- collateral damage 96
- bump off 106
- big name 143
- tremendously 149
- Medic 154
- piling 46
- gothic 99
- angulous 41
- legged 73
- doppelgänger 420
- omnivore 192
- shale 75
- multifunction 46
- fireplace 136
- teleport 41
- mechanized 58
- Resilient 95
half-life
1 ENTRIES FOUND:
plural half-lives
plural half-lives
Learner's definition of HALF-LIFE
[count] technical
: the time it takes for a radioactive substance to lose half its radioactivity（放射物质的）半衰期 — often used figuratively to describe how long something remains useful or popular常用作比喻，指某物的繁荣期或流行期
- a half-life of 200,000 years*20万年的半衰期
- Slang usually has a short half-life. [=slang usually is popular for only a short time]俚语的流行周期通常很短。
1
: the time required for half of something to undergo a process: such as
a
: the time required for half of the atoms of a radioactive substance to become disintegrated
b
: the time required for half the amount of a substance (such as a drug, radioactive tracer, or pesticide) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes
Word History
First Known Use
1907, in the meaning defined at sense 1
Time Traveler
The first known use of half-life was in 1907 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
切換為繁體中文