American Heritage Dictionary
Century Dictionary
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GNU Webster's 1913
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WordNet
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Elsewhere on the web
Nearly all rotifers have chitinous jaws called trophi that grind and shred food.
The shape of the toes, their proportion to body length, and the type of trophi (chitinous jaws) are important characteristics for identifying individual species.
The trophi (chitinous jaws) can be thrust partly out of the mouth to capture prey.

Century Dictionary (1)
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