The Collaborative International Dictionary of English v.0.48:

Phanerogamia \Phan`er*o*ga"mi*a\, n. pl. [NL., fr. Gr. fanero`s
   visible (fr. fai`nein to bring to light) + ga`mos marriage.]
   (Bot.)
   That one of the two primary divisions of the vegetable
   kingdom which contains the phanerogamic, or flowering,
   plants.
   [1913 Webster]