The Collaborative International Dictionary
Sea hen
Sea hen \Sea" hen`\ (Zo["o]l.) The common guillemot; -- applied also to various other sea birds.
Wiktionary
sea hen
n. Any of various seabirds, especially the common guillemot.
Usage examples of "sea hen".
She did not begin her turn until the Surprise had set her royal studdingsails and her masts were complaining again as they drove her five hundred tons even faster through the sea hen deck leaning sharply, her lee headrails buried in the foam, the sea roaring along her side, and the hands standing mute -never a sound fore and aft.