n. 尺蠖

[ noun ]
small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae
<noun.animal>

Inchworm \Inch"worm`\, n. (Zo["o]l.)
The larva of any geometrid moth. It progresses forward by
first bringing the rear end of the body forward, forming a
loop, then moving the front part of the body; called also
{measuring} worm, {measuringworm}, {spanner}, and {looper}.
See {Geometrid}.

Dropworm \Drop"worm`\ (dr[o^]p"w[^u]rm`), n. (Zo["o]l.)
The larva of any geometrid moth, which drops from trees by
means of a thread of silk, as the {cankerworm} or {inchworm}.
See {inchworm} and {geometrid}.