Webster's Revised Unabridged Dictionary · 1913

Chinch

Chinch , noun

[Compare Sp. chinche, from Latin cimex.]

1.
(Zoology) The bedbug (Cimex lectularius).
2.
(Zoology) A bug (Blissus leucopterus), which, in the United States, is very destructive to grass, wheat, and other grains; -- also called chiniz, chinch bug, chink bug. It resembles the bedbug in its disgusting odor.