Webster's Revised Unabridged Dictionary · 1913

Cecidomyia

Cecidomyia (ses`i*do*mī"i*ȧ) , proper noun

[Nl., from Greek khki`s, khki^dos, a gall nut + myi^a a fly.]

(Zoology) A genus of small dipterous files, including several very injurious species, as the Hessian fly. See Hessian fly.