from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A cell in the outer wing of insects which is often thickened or coloured and so stands out from other cells.
from the GNU version of the Collaborative International Dictionary of English
- n. A thickened opaque spot on the wings of certain insects.
from The Century Dictionary and Cyclopedia
- n. The carpus or stigma, a peculiar mark or spot on the wings of some insects.
Ancient Greek πτερόν (pteron) + στίγμα (stigma), meaning "wing mark". (Wiktionary)