iff

¹

Mathematics.

1. if and only if.

IFF

²

Military.

1. Identification, Friend or Foe: a system of transmitters and transponders that uses coded signals to distinguish between friendly and hostile aircraft.

IFF

¹

abbreviation for

1. Identification, Friend or Foe: a system using radar transmissions to which equipment carried by friendly forces automatically responds with a precoded signal

iff

²

/ 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 one another. Usually iff is used for equivalence in the metalanguage, rather than as the biconditional in the object language

Example Sentences

However, when they checked the usual suspects, namely proteins from the highly conserved ALS and IFF/HYR families, they came up mostly short, except for one protein, IFF4109, with a partial affect.

From Science Daily

"There are a lot of open questions: the use of emergency law overriding the views of shareholders or the treatment of bond holders," said Stefan Legge, head of tax and trade policy at the University of St. Gallen's IFF Institute for Financial Studies.

From Reuters

A spokesperson at the European headquarters of IFF did not immediately respond to an emailed request for comment.

From Reuters

Symrise said on Wednesday it had a 12% share of the combined market for fragrances, flavours, aroma chemicals and cosmetic ingredients last year, with Givaudan, IFF and Firmenich accounting for 18%, 22% and 11%, respectively.

From Reuters

Sachem Head invests with chemicals company Olin Corporation, flavors and fragrance company IFF and food service distributor US Foods Holding and each one replaced its chief executive officer after Sachem Head became involved.

From Reuters