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Definition of invertebrate
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 invertebrate is as below...
Invertebrate
(a.)
Destitute
of a
backbone;
having
no
vertebrae;
of or
pertaining
to the
Invertebrata.
Lern More About Invertebrate
☛ Wiki Definition of Invertebrate
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Retinula
::
Retinula
(n.) One of the group of
pigmented
cells which
surround
the
retinophorae
of
invertebrates.
See
Illust.
under
Ommatidium.
Retineum
::
Retineum
(n.) That part of the eye of an
invertebrate
which
corresponds
in
function
with the
retina
of a
vertebrate.
Ocellus
::
Ocellus
(n.) A
little
eye; a
minute
simple
eye found in many
invertebrates.
Water Pore
::
Water pore () A pore by which the water tubes of
various
invertebrates
open
externally.
Enteropneusta
::
Enteropneusta
(n. pl.) A group of
wormlike
invertebrates
having,
along the sides of the body,
branchial
openings
for the
branchial
sacs, which are
formed
by
diverticula
of the
alimentary
canal.
Balanoglossus
is the only known
genus.
See
Illustration
in
Appendix..
Hermaphrodite
::
Hermaphrodite
(n.) An
individual
which has the
attributes
of both male and
female,
or which
unites
in
itself
the two
sexes;
an
animal
or plant
having
the parts of
generation
of both
sexes,
as when a
flower
contains
both the
stamens
and
pistil
within
the same
calyx,
or on the same
receptacle.
In some cases
reproduction
may take place
without
the union of the
distinct
individuals.
In the
animal
kingdom
true
hermaphrodites
are found only among the
invertebrates.
See
Illust.
in
Appendix,
under Helmi
Arm
::
Arm (n.) A limb, or
locomotive
or
prehensile
organ,
of an
invertebrate
animal..
Epizoon
::
Epizoon
(n.) One of the
artificial
group of
invertebrates
of
various
kinds,
which live
parasitically
upon the
exterior
of other
animals;
an
ectozoon.
Among them are the lice,
ticks,
many
acari,
the
lerneans,
or fish lice, and other
crustaceans..
Pseudo-heart
::
Pseudo-heart
(n.) Any
contractile
vessel
of
invertebrates
which is not of the
nature
of a real
heart,
especially
one of those
pertaining
to the
excretory
system..
Vent
::
Vent (n.) The anal
opening
of
certain
invertebrates
and
fishes;
also, the
external
cloacal
opening
of
reptiles,
birds,
amphibians,
and many
fishes..
Radiata
::
Radiata
(n. pl.) An
extensive
artificial
group of
invertebrates,
having
all the parts
arranged
radially
around
the
vertical
axis of the body, and the
various
organs
repeated
symmetrically
in each ray or
spheromere..
Tentacle
::
Tentacle
(n.) A more or less
elongated
process
or
organ,
simple
or
branched,
proceeding
from the head or
cephalic
region
of
invertebrate
animals,
being
either
an organ of
sense,
prehension,
or
motion..
Perisome
::
Perisome
(n.) The
entire
covering
of an
invertebrate
animal,
as
echinoderm
or
coelenterate;
the
integument..
Testacea
::
Testacea
(n. pl.)
Invertebrate
animals
covered
with
shells,
especially
mollusks;
shellfish..
Scale
::
Scale (n.) One of the small
scalelike
structures
covering
parts of some
invertebrates,
as those on the wings of
Lepidoptera
and on the body of
Thysanura;
the
elytra
of
certain
annelids.
See
Lepidoptera..
Chitin
::
Chitin
(n.) A white
amorphous
horny
substance
forming
the
harder
part of the outer
integument
of
insects,
crustacea,
and
various
other
invertebrates;
entomolin..
Exoskeleton
::
Exoskeleton
(n.) The
hardened
parts of the
external
integument
of an
animal,
including
hair,
feathers,
nails,
horns,
scales,
etc.,as
well as the armor of
armadillos
and many
reptiles,
and the
shells
or
hardened
integument
of
numerous
invertebrates;
external
skeleton;
dermoskeleton..
Skeleton
::
Skeleton
(n.) The more or less firm or
hardened
framework
of an
invertebrate
animal.
Pharyngopneusta
::
Pharyngopneusta
(n. pl.) A group of
invertebrates
including
the
Tunicata
and
Enteropneusta.
Hair
::
Hair (n.) A
slender
outgrowth
from the
chitinous
cuticle
of
insects,
spiders,
crustaceans,
and other
invertebrates.
Such hairs are
totally
unlike
those of
vertebrates
in
structure,
composition,
and mode of
growth..
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