International Federation of Environmental Health
Mathematics. 1. if and only if. Military. 1. Identification, Friend or Foe: a system of transmitters and transponders that uses coded signals to distinguish between friendly and hostile aircraft. /ɪf/ conjunction 1. (logic) a shortened form of if and only if: it indicates that the two sentences so connected are necessary and sufficient conditions for […]
[if-uh n] /ˈɪf ən/ conjunction, Dialect. 1. .
International Foundation for Functional Gastrointestinal Disorders
[if-ee] /ˈɪf i/ adjective, iffier, iffiest. Informal. 1. full of unresolved points or questions: an iffy situation. 2. doubtful; questionable: An early decision on this is iffy. /ˈɪfɪ/ adjective iffier, iffiest 1. (informal) uncertain or subject to contingency: this scheme sounds a bit iffy adj. 1937, American English, from if + -y (2). Originally associated […]