#1
Os n. [
os] a mouth or mouthlike opening
. wn #2
Os n. [
osmium, atomic number 76] a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
. wn #3
Os n. [
operating system, OS] (computer science) software that controls the execution of computer programs and may provide various services
. wn #4
Os n. [
oculus sinister, OS] the left eye
. wn #5
Os n. [
bone, os] rigid connective tissue that makes up the skeleton of vertebrates
. wn