Other forms: eyelashes
An eyelash is one of the short hairs along the edge of an eyelid. Long eyelashes, an eyelash in my eye, flutter her eyelashes.
They are not decoration: they trigger a blink when touched and they cut the airflow across the eye, which slows drying — a measured effect that holds across many mammals. Each one lives a few months and falls out on its own.
1nouneyelashOne of the short hairs on the edge of an eyelid.
“She blinked hard as an eyelash fell into her eye.”
eyelash is a hair.
Eye plus lash. Lash in this sense is Middle English, of uncertain origin, perhaps imitative.
From eye + lash.
Etymology from Wiktionary, CC BY-SA