ETALONS
7
Scrabble
9
WWF
E(1) T(1) A(1) L(1) O(1) N(1) S(1)
NWL/TWL ✓ Collins ✓ WWF ✓
Definition
noun
- An optical device containing parallel mirrors, used as a narrow band filter, often in laser design.
Source: Wiktionary
