inchworm

from WordNet (r) 3.0 (2006)

inchworm
    n 1: small hairless caterpillar having legs on only its front
         and rear segments; mostly larvae of moths of the family
         Geometridae [syn: {measuring worm}, {inchworm}, {looper}]

from The Collaborative International Dictionary of English v.0.48

Inchworm \Inch"worm`\, n. (Zool.)
   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}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Dropworm \Drop"worm`\ (dr[o^]p"w[^u]rm`), n. (Zool.)
   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}.
   [1913 Webster]

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