os definitions WordNet (r) 3.0 (2005) n 1: a mouth ... of the platinum metals; the heaviest metal known [syn: osmium, Os, atomic number 76] 3: (computer science) software that controls the ... computer programs and may provide various services [syn: operating system, OS] 4: the left eye [syn: oculus sinister, OS] 5: rigid connective tissue that makes up the skeleton of vertebrates [syn: bone, os] Merriam Webster's symbol osmium Merriam Webster's abbreviation 1 ... Merriam Webster's I. noun (plural ossa) Etymology: Latin oss-, os — more at osseous Date: 15th century bone II. noun ( ...
os triquetrum definitions WordNet (r) 3.0 (2005) n 1: a ... pisiform and hamate and lunate bones [syn: triquetral, triquetral bone, os triquetrum, cuneiform bone, pyramidal bone]