(uncountable) Initialism of frequency modulation. / (countable, military) Initialism of field marshal. / (countable) Initialism of finance minister. / (countable) Initialism of foreign minister.

Either of the horn-like protuberances on the heads of giraffes and male okapi. Some extinct species in the family bore antler-like ossicones.

A wearable device that allows a user to measure their heart rate in real time, usually consisting of a chest strap transmitter and a wrist receiver.

(idiomatic) Very little; not a lot.