the GNU version of the Collaborative International Dictionary of English
n. The organ with which many insects and some other animals deposit their eggs. Some ichneumon files have a long ovipositor fitted to pierce the eggs or larvæ of other insects, in order to lay their own eggs within the same.
The Century Dictionary and Cyclopedia
n. The ovipositing organ with which many (especially hymenopterous, orthopterous, coleopterous, and dipterous) insects are provided, and by means of which they place their eggs in a position suitable for development.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. egg-laying tubular structure at the end of the abdomen in many female insects and some fishes
Word Usage
"He says female cicadas use a sword-like organ, called an ovipositor, to slice into small tree branches and insert their eggs."