noun (pl) -kos
a tropical African hardwood tree of the genus Chlorophora
the hard reddish-brown wood of this tree
[ahy-ern] /ˈaɪ ərn/ noun 1. Chemistry. a ductile, malleable, silver-white metallic element, scarcely known in a pure condition, but much used in its crude or impure carbon-containing forms for making tools, implements, machinery, etc. Symbol: Fe; atomic weight: 55.847; atomic number: 26; specific gravity: 7.86 at 20°C. Compare , , , . 2. something hard, […]
iron-59 n. An iron isotope that is a beta emitter with a half-life of 45.1 days and is used as a tracer in the study of iron metabolism.
noun 1. the period in the history of humankind, following the Stone Age and the Bronze Age, marked by the use of implements and weapons made of iron. 2. (lowercase) Classical Mythology. the present age, following the bronze age; the last and worst of the four ages of the human race, characterized by danger, corruption, […]
noun, Chemistry. 1. . noun, Chemistry. 1. a green, crystalline, water-soluble, synthetically produced powder, (NH 4) 3 Fe(C 2 O 4) 3 ⋅3H 2 O, used chiefly in the manufacture of blueprint paper.