dinoflagellaten. a member of the Dinoflagellata, chiefly marine protozoa having two flagella. The dinoflagellates form a chief constituent of plankton.
Di*nor"nis(?), n. [NL., fr. Gr. terrible + bird.] (Paleon.) A genus of extinct, ostrichlike birds of gigantic size, which formerly inhabited New Zealand. See Moa.
Di`no*sau"ri*an(?), } n. [Gr. terrible + lizard.] (Paleon.) One of the Dinosauria.
Di`no*sau"ri*a(?), n. pl. [NL., fr. Gr. terrible + lizard.] (Paleon.) An order of extinct mesozoic reptiles, mostly of large size (whence the name). Notwithstanding their size, they present birdlike characters in the skeleton, esp. in the pelvis and hind limbs. Some walked on their three-toed hind feet, thus producing the large "bird tracks," so-called, of mesozoic sandstones; others were five-toed and quadrupedal. See Illust. of Compsognathus, also Illustration of Dinosaur in Appendix.
Di`no*the"ri*um(?), } n. [NL. dinotherium, fr. Gr. deino`s terrible + qhri`on beast.] (Paleon.) A large extinct proboscidean mammal from the miocene beds of Europe and Asia. It is remarkable for a pair of tusks directed downward from the decurved apex of the lower jaw.
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Thu 20th February 2020