a. 1. Abounding with streams, or with running water; streamful. [ 1913 Webster ]

Arcadia
However streamy now, adust and dry,
Denied the goddess water. Prior. [ 1913 Webster ]

2. Resembling a stream; issuing in a stream. [ 1913 Webster ]

His nodding helm emits a streamy ray. Pope. [ 1913 Webster ]