سَحَابٌ زَمْزَامٌ

Clouds thundering, but not loudly and clearly. (AHn, TA.) [Accord. to one passage in the TA, زَمْزَامٌ seems to be explained by IKh as meaning Thundering much: but the passage appears to be incorrectly transcribed.]

See also زَمْزَمٌ.