رِئَةٌ
Root: رأى
Full Definition
رِئَةٌ
with ء, and رِيَةٌ without ء, The سَحْر [or lungs, or lights]; the place of the breath and wind of a man &c., [i. e.] of an animal: the ة is a substitute for the ى which is suppressed: pl. رِئُونَ, agreeably with a general rule relating to words of this class, and رِئَاتٌ: dim.
رُؤَيَّةٌ and رُوَيَّةٌ Some say that the suppressed letter [in رِيَةٌ] is و; and that it is originally وِرْيَةٌ like as عِدَةٌ is originally وِعْدَةٌ: and وَرَيْتُهُ signifies “ I hit, or hurt, his رِيَة ” [hence ذَاتُ الرِّئَةِ
Inflammation of the lungs.]