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blast

 [blast]
1. an immature stage in cellular development before appearance of the definitive characteristics of the cell; used also as a word termination, as in ameloblast and trophoblast.
blast cell.
2. the wave of air pressure produced by the detonation of high-explosive bombs or shells or by other explosions; it causes pulmonary damage and hemorrhage (lung blast, blast chest), laceration of other thoracic and abdominal viscera, ruptured eardrums, and effects in the central nervous system.

blast

(blast),
General term for immature or precursor cell.
[G. blastos, germ]

blast

(blast)
1. an immature stage in cellular development before appearance of the definitive characteristics of the cell; used also as a word termination (see -blast ).
2. blast cell (2).

blast

(blast) the wave of air pressure produced by the detonation of high-explosive bombs or shells or by other explosions; it causes pulmonary concussion and hemorrhage (lung blast, blast chest), laceration of other thoracic and abdominal viscera, ruptured eardrums, and minor effects in the central nervous system.

blast

1 a primitive cell, such as an embryonic germ cell.
2 a cell capable of building tissue, such as an osteoblast in growing bone.

BLAST

Basic Local Alignment Search Tool. A nucleic acid- and protein-sequence comparison algorithm which is used to find matches in gene sequences and to search sequence databases for optimal local alignments to a query sequence.

BLAST uses a heuristic algorithm, seeking local alignments and creating a matrix of similarity scores for all possible pairs of residues, defining high-scoring segments, statistically evaluating the significance of the results and detecting relationships among sequences which share only isolated regions of similarity.

blast

noun Hematology A general term for a primitive blood cell. See Blast cell, Blast crisis.

blast

(blast)
General term for immature or precursor cell.
[G. blastos, germ]

BLAST (Basic Local Alignment Search Tool)

a sequence comparison algorithm used to search DNA or PROTEIN databases. For example, BLASTN is used for homology searching to compare nucleotide sequences.

The query sequence is entered and compared with a nucleotide sequence database.

blast

(blast)
General term for immature or precursor cell.
[G. blastos, germ]

blast

1. an immature stage in cellular development before appearance of the definitive characteristics of the cell; used also as a word termination, as in ameloblast, etc.
2. the wave of air pressure produced by the detonation of high-explosive bombs or shells or by other explosions; it causes pulmonary damage and hemorrhage (lung blast, blast chest), laceration of other thoracic and abdominal viscera, ruptured eardrums, and effects in the central nervous system.

blast cells
the precursor cells of bone marrow. See also myeloblast, monoblast, erythroblast, megakaryoblast.
References in periodicals archive ?
China's Long March-3B rocket, carrying the Beidou-M3 and Beidou-M4 satellites, has blasted off from the Xichang Satellite Launch Centre in southwest China's Sichuan Province.
All shuttle engines are ground-tested before they are used in a launching, and NSTL has been conducting such tests since 1975, six years before the shuttle first blasted off.
Summary: Europe's first Vega rocket has blasted off, with nine scientific satellites on board.
THE fastest ever space probe blasted off from Florida yesterday after a two-day delay.
Summary: A Soyuz capsule has blasted off, carrying the first relief crew to the ISS to in months following a rocket failure in August.
The rocket blasted off from the Russian-leased Baikonur space launch site.