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Webster 1913 Edition

Adj.

[

Meso-

+ Gr. [GREEK] anything round, a hoop.]

(Zool.)

Having the middle of the body surrounded by bands of cilia; – said of the larvae of certain marine annelids.

mesotrochal ‎(not comparable)

(zoology) Having the middle of the body surrounded by bands of cilia; said of the larvae of certain marine annelids.