the early developmental stage of an animal, following the morula stage and consisting of a single, spherical layer of cells enclosing a hollow, central cavity.
(embryol) the process of blastula formation
noun (pl) -las, -lae (-liː)
an early form of an animal embryo that develops from a morula, consisting of a sphere of cells with a central cavity Also called blastosphere
blas’tu·la’tion (-lā’shən) n.
Plural blastulas or blastulae (blās’chə-lē’)
An animal embryo at the stage immediately following the division of the fertilized egg cell, consisting of a ball-shaped layer of cells around a fluid-filled cavity known as a blastocoel. Compare gastrula. See also blastocyst.
Note: This is the stage of development where embryonic stems cells can be harvested for medical research.
blastus Historical Examples The Wonders of Life Ernst Haeckel
bleat. to make a loud or raucous noise. to utter loudly and indiscreetly; blurt. bleat (def 4). Historical Examples Letters of Major Jack Downing, of the Downingville Militia Seba Smith Rope Holworthy Hall Jokes For All Occasions Anonymous Bat Wing Bowles Dane Coolidge The Trail Boys on the Plains Jay Winthrop Allen The Corner House […]
brazenly obvious; flagrant: a blatant error in simple addition; a blatant lie. offensively noisy or loud; clamorous: blatant radios. tastelessly conspicuous: the blatant colors of the dress. Contemporary Examples Ann Patchett’s ‘State of Wonder’ and Other Twists on Classic Novels Caryn James December 6, 2011 Cardinal Timothy Dolan’s Belated Health-Care Conversion Matthew DeLuca February 21, […]
brazenly obvious; flagrant: a blatant error in simple addition; a blatant lie. offensively noisy or loud; clamorous: blatant radios. tastelessly conspicuous: the blatant colors of the dress. Historical Examples The Best Short Stories of 1921 and the Yearbook of the American Short Story Various Desert Dust Edwin L. Sabin Cathedrals and Cloisters of the South […]