بَيُّوتٌ

That has remained throughout a night [and so become stale; stale from being a night old]; as also ↓ بَايءِتٌ: both, in this sense, [but the latter more usually,] applied to bread. (S, K.)

Cold, or cool, water, (M, K,) that has become so from its having remained throughout a night: (M:) or water that remains during the night beneath the sky: (Ham p. 553:) or water that has been cooled in the leathern bag by night; and in like manner, milk; for [Az says,] I heard an Arab of the desert say, اِسْقِنِى مِنْ بَيُّوتِ السِّقَاءِ, meaning Give thou me to drink of the milk that has been milked at night and left in the skin so that it has become cold, or cool, by night. (T.) In the saying,

فَصَبَّحَتْ حَوضَ قِرًى بَيُّوتَا

the meaning seems to be, قِرَى حَوْضٍ بَيُّوتَا, i. e., [And they (apparently camels) came in the morning to] the collected water of a trough, which water had remained throughout the night and so become cold, or cool; the phrase being inverted. (M.)

أَمْرٌ بَيُّوتٌ (assumed tropical:) An affair, or event, for which, or on account of which, one passes the night in anxiety or grief. (S, K.)

هَمٌّ بَيُّوتٌ (assumed tropical:) Anxiety, or grief, that has remained during the night in the bosom. (M.)

سِنٌّ بَيُّوتَةٌ A tooth that does not fall out, or become shed. (K.)