retinisˈpora or retinosˈpora noun

A cypress or related conifer in a perpetuated juvenile form, once placed in a separate genus

retˈinite noun

1. Pitchstone (obsolete)
2. A fossil resin

retˈinoid adjective

Resembling resin

A chemical variant of vitamin A, with powerful effect when used as a drug

retˈinol noun

1. An oil distilled from resin
2. Vitamin A

retinōˈic acid noun

1. A derivative of vitamin A that is important in morphogenesis and embryo development
2. A lotion containing this used in treating acne and other skin conditions