Webster’s Revised Unabridged Dictionary · 1913
Windowpane
Win′dow·pane′ (·pān′), n. 1. (Arch.) See Pane, n., b. [In this sense, written also window pane.]
2. (Zoöl.) A thin, spotted American turbot (Pleuronectes maculatus) remarkable for its translucency. It is not valued as a food fish. Called also spotted turbot, daylight, spotted sand flounder, and water flounder.