Where does “lens cap” come from?

lens cap (English) comes from English Cap, from English Capricorn, from French Capricorne, from Latin Capricornus, from Latin caper, from Proto-Italic *kapros, from Proto-Indo-European kápros — he-goat, billy goat.

lens cap (English): The detachable cap that protects the camera lens...

Definitions

  1. The detachable cap that protects the camera lens...

Ancestry of “lens cap”, step by step

lens cap traces back through two separate lines of ancestry.

via English Cap

StepLanguageWordMeaning
1EnglishCapA nickname for the captain of a team, ship, etc
2EnglishCapricornSomeone with a Capricorn star sign
3FrenchCapricorneCapricorn
4LatinCapricornusCapricornus, the constellation of the zodiac
5Latincapera male goat, billy goat; vocative singular of...
6Proto-Italic*kaproshe-goat
7Proto-Indo-Europeankáproshe-goat, billy goat

via English lens

StepLanguageWordMeaning
1EnglishlensAn object, usually made of glass, that focuses or...
2Latinlēnslentil
Every word from Proto-Indo-European káprosEvery word from Proto-Italic *kaprosEvery word from Latin caper