[ˈsɪŋɡlɪt], (Noun)

Definitions:
- a sleeveless garment worn under or instead of a shirt; a vest

- a single unresolvable line in a spectrum, not part of a multiplet

- an atomic or molecular state in which all electron spins are paired
(e.g: singlet oxygen)


Phrases:

Origin:
mid 18th century (originally denoting a man's short jacket): from single(because the garment was unlined) + -et, on the pattern of doublet