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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 ?
The rocket blasted off from the Jiuquan launch site in northwestern China.
After two days of delays due to minor technical concerns, the Atlas 5 booster blasted off from the Florida space launch-site.
As flash is blasted off the parts, the spent media and flash are evacuated through a blower system that moves the material to the overhead cyclone, eliminating the troublesome screw conveyor to move the material quickly.
With John Young, veteran of two Gemini and two Apollo flights, and Bob Crippen at the controls, Columbia blasted off April 12, 1981, from Kennedy Space Center in Florida.
An International Launch Services (ILS) Atlas III rocket blasted off early this morning, successfully orbiting the MBSAT satellite for Space Systems/Loral (SS/L).
Summary: China's Long March-3B rocket has blasted off from the Xichang Satellite Launch Centre carrying twin satellites.
The 40-year-old Iranian yesterday blasted off for an 10-day trip to the International Space Station, costing pounds 11million, from a site in Kazakhstan.
The shuttle blasted off on the delivery mission March 8.
SPACE shuttle Atlantis blasted off from Cape Canaveral last night with the most crucial piece of the international space station.
When the space shuttle Atlantis finally blasted off last week, a full week behind schedule, NASA estimated the delay had cost the agency a whopping $2.
Summary: A European Ariane rocket blasted off from French Guiana on Friday, carrying supplies to the International Space Station.
The 40-year-old Iranian yesterday blasted off for a 10-day, pounds 11million trip to the International Space Station.