Linse

Meaning

1. (feminine) lens
2. (feminine) lentil

Concepts

lens

lentil

lentils

lense

lenticular

pea

bean

Lentil

crystalline

eyeglass

Synonyms

Objektiv

Linsensystem

Okular

Brennglas

Linsen

Brillenglas

Kristallinse

Erve

Augenglas

Kristallin

Augenlinse

Bohne

Erbse

Translations

lentille

lenteja

lenticchia

lentilha

linze

lente

lente

mercimek

φακή

lente

φακός

lens

عدس

Pronounced as (IPA)

/ˈlɪnzə/

Etymology

Inherited from Middle High German: linse

Inherited from Old High German: linsa

Cognate with Latin: lēns

Cognate with Lithuanian: lęšis

Cognate with Church Slavic: лѧща

In summary

From Middle High German linse, from Old High German linsa, likely a borrowing from an unidentified source.
Compare Latin lēns, Lithuanian lęšis, and Old Church Slavonic лѧща (lęšta) sounding too similar for a coincidence, however different enough to prohibit reconstruction of a common PIE protoform.
If ultimately a non-IE loanword, locating the source is virtually impossible because cultivation of lentil was widespread in the region since the Neolithic.
The sense ‘lens’ is a semantic loan from Latin lēns (“lentil; lens”).