Phoronis \Pho*ro"nis\, n. [NL., fr. L. Phoronis, a surname of
Io, Gr. ?.] (Zool.)
A remarkable genus of marine worms having tentacles around
the mouth. It is usually classed with the gephyreans. Its
larva (Actinotrocha) undergoes a peculiar metamorphosis.
[1913 Webster]