| slovo | definícia |
naked-eyed medusae
(gcide) | 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]}.
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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.
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naked-eyed medusae
(gcide) | 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.
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2. [pl. Medusae.] (Zool.) Any free swimming acaleph; a
jellyfish.
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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.
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