(abbreviation) Icelandic.

The ICAO radiotelephony spelling alphabet of the International Civil Aviation Organization. This alphabet assigns names to letters of the alphabet for clearer enunciation (and for the same reason pronounces the numeral 9 as "niner"):

A drooping, tapering shape of ice.

(idiomatic) A small indication of a larger possibility; the first part encountered of a problem that is much bigger than it seems.

(sciences) The concentration of an inhibitor that is required for 50-percent inhibition of an enzyme in vitro.

(international law) Initialism of International Criminal Court. / (banking) Initialism of International Chamber of Commerce. / (cricket) Initialism of International Cricket Council.

(weaponry) Initialism of intercontinental ballistic missile.

Acronym of International Civil Aviation Organization.; a United Nations agency headquartered in Montreal, Canada

(informal) Unpleasantly sticky; yucky; disgusting. / (informal) Excessively sentimental. / (informal) Unwell or upset; in a bad state of mind or health.

(medicine) Initialism of intensive care unit. / (transport) Initialism of intersection capacity utilization: a measure of the capacity of a roadway intersection.