Extended Strong's Greek Lexicon (Abbott-Smith based)
rainbow
Usage: ἶρις, -ιδος, ἡ [in LXX: Exo.30:24 (קִדָּה)*, (קֶשֶׁת, Gen.9:13, Eze.1:28, is rendered by τόξον) ;] __1. Iris, the messenger of the gods. __2. a rainbow or halo: Rev.4:3 10:1. __3. The plant Iris (cf. Ex., l.with).† (AS)