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Wiktionary(0.00 / 0 votes)Rate this definition: 1  arytenoid(Noun) Either of a pair of movable cartilages in the larynx that serve as posterior attachment points for the vocal folds; a muscle attached to this cartilage, or a gland located near it. 2  arytenoid(Adjective) Of, or relating to this cartilage, muscle or gland.
Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.lthough argon is a noble gas, it has been found to have the capability of forming some compounds. For example, the creation of argon fluorohydride (HArF), a compound of argon with fluorine and hydrogen which is stable below 17 K, was reported by researchers at the University of Helsinki in 2000.