MARE'S-TAIL

n.

2 definitions — Webster’s Dictionary (1828)


1.
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. Old Rhyme.

2.
n.

An aquatic plant of the genus Hippuris (H.vulgaris), having narrow leaves in whorls.