Source : Webster's Revised Unabridged Dictionary (1913)

Planogamete \Plan"o*ga*mete`\, n. [Gr. ? wandering + E. gamete.]
   (Bot.)
   One of the motile ciliated gametes, or zo["o]gametes, found
   in isogamous plants, as many green alg[ae] (Chlorophyce[ae]).