shortened form of United Kingdom of Great Britain and Northern Ireland (1922-Present) Abbreviation: GBNI.

An alloy of iron, carbon, and silicon that contains 1.7 to 4.5% carbon and 1 to 3% silicon.

A kind of cast iron that contains carbon as cementite, unlike gray iron, which contains carbon as graphite.

English as spoken in Ireland.

(rare) the beak (tapered end) of an anvil

(obsolete, especially in plural) A tool used to remove the bark from trees. / (dated, slang) A pistol.

(mineralogy) The mineral arsenopyrite.

(physics) A minor stable isotope of iron, ⁵⁴₂₆Fe, having 26 protons and 28 neutrons; it amounts to about 6% of the element in nature

(physics) A minor stable isotope of iron, ⁵⁷₂₆Fe, having 26 protons and 31 neutrons; it amounts to about 2% of the element in nature

(physics) A minor stable isotope of iron, ⁵⁸₂₆Fe, having 26 protons and 32 neutrons; it amounts to about 0.3% of the element in nature