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The Collaborative International Dictionary
Leptiform

Leptiform \Lep"ti*form\ (-t[i^]*f[^o]rm), a. [Leptus + -form.] (Zo["o]l.) Having a form somewhat like leptus; -- said of active insect larv[ae] having three pairs of legs. See Larva.

Wiktionary
leptiform

a. (context zoology English) Having a form somewhat like leptus; said of active insect larvae with three pairs of legs.