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Definition of zooid
Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of zooid is as below...
Zooid (n.) One of the
individual
animals
in a
composite
group,
as of
Anthozoa,
Hydroidea,
and
Bryozoa;
--
sometimes
restricted
to those
individuals
in which the mouth and
digestive
organs
are not
developed..
Lern More About Zooid
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Calicle
::
Calicle
(n.) One of the small
cuplike
cavities,
often with
elevated
borders,
covering
the
surface
of most
corals.
Each is
formed
by a
polyp.
(b) One of the
cuplike
structures
inclosing
the
zooids
of
certain
hydroids.
See
Campanularian..
Zooid
::
Zooid (a.)
Pertaining
to, or
resembling,
an
animal..
Coenenchyma
::
Coenenchyma
(n.) The
common
tissue
which
unites
the
polyps
or
zooids
of a
compound
anthozoan
or
coral.
It may be soft or more or less
ossified.
See
Coral.
Antherozooid
::
Antherozooid
(n.) One of the
mobile
male
reproductive
bodies
in the
antheridia
of
cryptogams.
Hydrophyllium
::
Hydrophyllium
(n.) One of the flat,
leaflike,
protective
zooids,
covering
other
zooids
of
certain
Siphonophora..
Ooecium
::
Ooecium
(n.) One of the
special
zooids,
or
cells,
of
Bryozoa,
destined
to
receive
and
develop
ova; an
ovicell.
See
Bryozoa..
Vibraculum
::
Vibraculum
(n.) One of the
movable,
slender,
spinelike
organs
or parts with which
certain
bryozoans
are
furnished.
They are
regarded
as
specially
modified
zooids,
of
nearly
the same
nature
as
Avicularia..
Zoanthus
::
Zoanthus
(n.) A genus of
Actinaria,
including
numerous
species,
found
mostly
in
tropical
seas. The
zooids
or
polyps
resemble
small,
elongated
actinias
united
together
at their bases by
fleshy
stolons,
and thus
forming
extensive
groups.
The
tentacles
are small and
bright
colored..
Zooidal
::
Zooidal
(a.) Of or
pertaining
to a
zooid;
as, a
zooidal
form..
Individual
::
Individual
(n.) An
independent,
or
partially
independent,
zooid of a
compound
animal..
Sporocyst
::
Sporocyst
(n.) An
asexual
zooid,
usually
forming
one of a
series
of
larval
forms in the
agamic
reproduction
of
various
trematodes
and other
parasitic
worms.
The
sporocyst
generally
develops
from an egg, but in its turn
produces
other
larvae
by
internal
budding,
or by the
subdivision
of a part or all of its
contents
into a
number
of
minute
germs.
See
Redia..
Pennatula
::
Pennatula
(n.) Any one of
numerous
species
of
Pennatula,
Pteroides,
and
allied
genera
of
Alcyonaria,
having
a
featherlike
form; a
sea-pen.
The
zooids
are
situated
along one edge of the side
branches..
Athecata
::
Athecata
(n. pl.) A
division
of
Hydroidea
in which the
zooids
are
naked,
or not
inclosed
in a
capsule.
See
Tubularian..
Campanularian
::
Campanularian
(n.) A
hydroid
of the
family
ampanularidae,
characterized
by
having
the
polyps
or
zooids
inclosed
in
bell-shaped
calicles
or
hydrothecae..
Spirant
::
Spiralozooid
(n.) One of the
special
defensive
zooids
of
certain
hydroids.
They have the form of long,
slender
tentacles,
and bear lasso
cells..
Foraminifera
::
Foraminifera
(n. pl.) An
extensive
order of
rhizopods
which
generally
have a
chambered
calcareous
shell
formed
by
several
united
zooids.
Many of them have
perforated
walls,
whence
the name. Some
species
are
covered
with sand. See
Rhizophoda..
Adelocodonic
::
Adelocodonic
(a.)
Applied
to
sexual
zooids
of
hydroids,
that have a
saclike
form and do not
become
free; --
opposed
to
phanerocodonic..
Siphonophora
::
Siphonophora
(n. pl.) An order of
pelagic
Hydrozoa
including
species
which form
complex
free-swimming
communities
composed
of
numerous
zooids
of
various
kinds,
some of which act as
floats
or as
swimming
organs,
others
as
feeding
or
nutritive
zooids,
and
others
as
reproductive
zooids.
See
Illust.
under
Physallia,
and
Porpita..
Dactylozooid
::
Dactylozooid
(n.) A kind of zooid of
Siphonophora
which has an
elongated
or even
vermiform
body, with one
tentacle,
but no
mouth.
See
Siphonophora..
Gonozooid
::
Gonozooid
(n.) A
sexual
zooid,
or
medusoid
bud of a
hydroid;
a
gonophore.
See
Hydroidea,
and
Illust.
of
Campanularian..
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