: a person or device that removes the stems from an agricultural product (such as tobacco leaves or grapes)
a mechanical stemmer
b
: software that generates stem words (see stementry 1 sense 4) from their inflected forms
The stemmer follows Porter's algorithm and works for Brazilian Portuguese by identifying the stem of words by incrementally removing their suffix/termination. Alexandre Ribeiro Afonso and Cláudio Gottschalg Duque