Quick definitions from WordNet (stem)

▸ noun:  the tube of a tobacco pipe
▸ noun:  a turn made in skiing; the back of one ski is forced outward and the other ski is brought parallel to it
▸ noun:  cylinder forming a long narrow part of something
▸ noun:  a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
▸ noun:  front part of a vessel or aircraft
▸ noun:  (linguistics) the form of a word after all affixes are removed ("Thematic vowels are part of the stem")
▸ verb:  grow out of, have roots in, originate in ("The increase in the national debt stems from the last war")
▸ verb:  cause to point inward ("Stem your skis")
▸ verb:  stop the flow of a liquid
▸ verb:  remove the stem from ("For automatic natural language processing, the words must be stemmed")
▸ name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #17968)

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▸ Also see stem