Mare's-tail /(?)/
Mare's·-tail
Mare's-tail
n.
-
A long streaky cloud, spreading out like a horse's tail, and believed to indicate rain; a cirrus cloud. See Cloud.
Mackerel sky and mare's-tails Make tall ships carry low sails.
- An aquatic plant of the genus Hippuris (Hippuris vulgaris), having narrow leaves in whorls. (Bot.)