ruff
(organic chemistry) A compound of this kind.
A circular frill or ruffle on a garment, especially a starched, fluted frill at the neck in Elizabethan and Jacobean England (1560s–1620s). / Anything formed with plaits or flutings like a frill.
(slang, US, chiefly military) quick, immediate
Third-person singular simple present indicative form of subitize
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