(chemistry) any compound derived from a carboxylic acid by replacing the carbonyl group with =NNH₂ and the hydroxyl group with -NHNH₂ (or substituted forms of both)

Any homoacetogenic bacterium

A village and civil parish in Rugby district, Warwickshire, England (OS grid ref SP4476).

(military) supporting fire; small-arms fire directed at an enemy to prevent them firing elsewhere.