Webster's Revised Unabridged Dictionary · 1913

Rosmarine

Rosmarine , noun

[Old English See Rosemary.]

1.
Dew from the sea; sea dew. [Obsolete]
That purer brine And wholesome dew called rosmarine. — B. Jonson
2.
Rosemary. [Obsolete] — Bp. Hall
Biting on anise seed and rosmarine. — Spenser

Rosmarine , noun

[Norw. rosmar a walrus; ros a horse (akin to English horse) + (probably) mar the sea.]

A fabulous sea animal which was reported to climb by means of its teeth to the tops of rocks to feed upon the dew.
And greedly rosmarines with visages deforme. — Spenser