1. of, relating to, or containing the chemical group C≡C-H (a carbon-carbon triple bond with a hydrogen atom)
Usage: chemistry; technical

1. the univalent chemical group C≡C-H derived from acetylene
Usage: chemistry; technical

Examples

• Ethinyl estradiol is a synthetic estrogen used in oral contraceptives.
• The ethinyl group is characterized by a triple bond between two carbon atoms.
• Chemists use ethinyl compounds in organic synthesis.
• The molecule contains an ethinyl substituent attached to the aromatic ring.
• Ethinyl acetylene derivatives have important pharmaceutical applications.