رِهْمَةٌ

A drizzling and lasting rain; i. e. a lasting, or continuous, rain, consisting of small drops: (JK:) or weak and lasting rain, (S, K,) said by AZ to be such as falls with more force, and passes away more quickly, than that which is termed دِيمَةٌ: (S:) plural رِهَمٌ and رِهَامٌ: (JK, S, K:) El-Ámidee seems to have held that رِهَامٌ is plural of رَهَمَةٌ; for he likens these two words to إِكَامٌ and أَكَمَةٌ; but this is at variance with what is held by the leading lexicologists. (TA.) [See an example of the plural رِهَامٌ in a verse of Lebeed cited in the first paragraph of article رزق.]