retinyl
/ˈrɛtɪnɪl/ /ˈrɛtɪnʌɪl/Biochemistry
noun
The radical —C20H28, derived from retinol (vitamin A1) by the loss of the hydroxyl group. Usually attributive or as a formative element in names.
Origin
1960s; earliest use found in Biochimica et Biophysica Acta. From retin- + -yl.