amyl /ˈæ.mɪl/adjective 1noun 2forms 1 adjective1 •Of or pertaining to starch noun2 •(informal) Ellipsis of amyl nitrite.Holy fuck! — it’s like a double amyl rush — popping in the cranium like a week-old orgasm. — 1993 •(old-fashioned) Synonym of pentyl. formsamyls