(n. pl.) Order of rhizopods, usually having a siliceous skeleton, or shell, and sometimes radiating spicules. The pseudopodia project from the body like rays. It includes the polycystines. See Polycystina.
Example Sentences:
(1) Reproduction is by isospores which resemble those in other spumellarian Radiolaria.
(2) The cells do not posses a skeleton as observed in many unicellular Radiolaria, but the cytoplasmic organization is similar.
(3) A similar kinetochore is found in certain Radiolaria, but with an intranuclear spindle apparatus the association with the nuclear membrane is no longer necessary and has been lost.
(4) The endoplasm is connected to the ectoplasm across a double membrane boundary by thin cytoplasmic strands called fusules whose structure resemble those in unicellular Radiolaria.
Radiolarian
Definition:
(a.) Of or pertaining to the Radiolaria.
(n.) One of the Radiolaria.
Example Sentences:
(1) There are various types of photoproteins: the photoproteins of coelenterates, ctenophores and radiolarians require Ca2+ to trigger their luminescence; the photoproteins of the bivalve Pholas and of the scale worm appear to involve superoxide radicals and O2 in their light-emitting reactions; the photoprotein of euphausiid shrimps emits light only in the presence of a special fluorescent compound; the photoprotein of the millipede Luminodesmus, the only known example of terrestrial origin, requires ATP and Mg2+ to emit light.
(2) However, colonies maintained in the dark have a decline in number of zooxanthellae and light microscopic examination shows they are being drawn into the ectoplasm of the radiolarian cells.
(3) Collozoum inerme (Müller) is a colonial Radiolarian containing numerous cells bound in a common gelatinous matrix.
(4) T. nucleata is a skeletonless, single-celled radiolarian commonly found in ocean surface water.
(5) The presence of aluminium (A1) in the nuclei of thyroid cells (Rabbits), liver and skin cells (Frogs) and in the nucleolus of a Radiolarian is described.