I. ˈsi.ˌtrēn sometimes -īn adjective
Etymology: Middle English, from Middle French citrin, from Medieval Latin citrinus, from Latin citrus citron tree + -inus -ine
1. : resembling a citron or lemon
2. : of the color citrine
II. si.ˈtrēn noun
( -s )
1. : a light olive color that is redder and deeper than grape green, redder and paler than old moss green, and redder and duller than average willow green — called also rhubarb
2. : a semiprecious yellow stone resembling topaz but actually black quartz changed in color by heating