from
The Collaborative International Dictionary of English v.0.48
Hydromedusa \Hy`dro*me*du"sa\, n.; pl. {Hydromedus[ae]}. [NL.
See {Hydra}, and {Medusa}.] (Zool.)
Any medusa or jellyfish which is produced by budding from a
hydroid. They are called also {Craspedota}, and {naked-eyed
medus[ae]}.
[1913 Webster]
Note: Such medus[ae] are the reproductive zooids or
gonophores, either male or female, of the hydroid from
which they arise, whether they become free or remain
attached to the hydroid colony. They in turn produce
the eggs from which the hydroids are developed. The
name is also applied to other similar medus[ae] which
are not known to bud from a hydroid colony, and even to
some which are known to develop directly from the eggs,
but which in structure agree essentially with those
produced from hydroids. See {Hydroidea}, and
{Gymnoblastea}.
[1913 Webster]
from
The Collaborative International Dictionary of English v.0.48
Medusa \Me*du"sa\, n. [L., fr. Gr. ?.]
1. (Class. Myth.) The Gorgon; or one of the Gorgons whose
hair was changed into serpents, after which all who looked
upon her were turned into stone.
[1913 Webster]
2. [pl. {Medusae}.] (Zool.) Any free swimming acaleph; a
jellyfish.
[1913 Webster]
Note: The larger medusae belong to the Discophora, and are
sometimes called {covered-eyed medusae}; others, known
as {naked-eyed medusae}, belong to the Hydroidea, and
are usually developed by budding from hydroids. See
{Discophora}, {Hydroidea}, and {Hydromedusa}.
[1913 Webster]
{Medusa bud} (Zool.), one of the buds of a hydroid, destined
to develop into a gonophore or medusa. See {Athecata}, and
{Gonotheca}.
{Medusa's head}.
(a) (Zool.) An astrophyton.
(b) (Astron.) A cluster of stars in the constellation
Perseus. It contains the bright star Algol.
[1913 Webster]