roach

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roach:

see cockroachcockroach
or roach,
name applied to some 4,600 species of flat-bodied, oval insects in the order Blattodea. Cockroaches have long antennae, long legs adapted to running, and a flat extension of the upper body wall that conceals the head. They range from 1-4 in. to 3 in.
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roach

[rōch]
(invertebrate zoology)
An insect of the family Blattidae; the body is wide and flat, the anterior part of the thorax projects over the head, and antennae are long and filiform, with many segments. Also known as cockroach.

roach

1
1. a European freshwater cyprinid food fish, Rutilus rutilus, having a deep compressed body and reddish ventral and tail fins
2. any of various similar fishes

roach

2
1. short for cockroach
2. Slang the butt of a cannabis cigarette

roach

3 Nautical
1. the amount by which the leech of a fore-and-aft sail projects beyond an imaginary straight line between the clew and the head
2. the curve at the foot of a square sail

roach

(jargon)
A Bell Labs term meaning destroy, especially of a data structure. Hardware gets toasted or fried, software gets roached.