(biochemistry) Any of a group of bacterial retinal proteins, related to rhodopsin, present in Chlamydomonas

(sports) An occurrence of the Paralympic Games. / (sports, rare) A period of four years between occurrences of the Paralympic Games.

(alt-right, white supremacy) Initialism of it's okay to be white; an intentionally innocuous slogan used as bait to maliciously generate backlash for the purpose of ridicule.

(obsolete) Synonym of enclosed, when used for fountains, cisterns, &c.