pterostigma

About 0.01 uses per million words.

Meaning

1. noun A spot on the outer wing of insects which is often thickened or coloured and so stands out from the rest; it is a group of specialized cells and has an effect on flight dynamics.

   The pterostigma is particularly noticeable in dragonflies.

Similar words

pseudopterostigma sterigma pterygium chromatophore morphostage stigmatophore endosternite profurcasternum acrosternite stemma

Often followed by

is of and in dark to brown with or