Definition of Plastid
Plas´tid
n.
1.
(Biol.)
A
formative
particle
of
albuminous
matter
;
a
monad
;
a
cytode
.
See
the
Note
under
Morphon
.
2.
(Bot.)
any
of
several
types
of
minute
granules
found
in
the
protoplasm
of
vegetable
cells
,
having
their
own
membrane
,
robosomes
,
and
DNA
.
Among
plant
cells
the
most
common
are
chloroplasts
,
which
contain
the
chlorophyll
and
the
photosynthetic
machinery
of
the
cell
.
They
are
divided
by
their
colors
into
three
classes
,
chloroplastids
,
chromoplastids
,
and
leucoplastids
.
Related Words
chloroplast
,
chromoplast
,
granule
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