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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 ?
Whether it's thirty minutes at home before bed or five minutes in line at the grocery store, kids can simultaneously play and learn with Brain Quest Blast Off, making them stronger students over time.
Caroline Durbin, from the museum, said: "We had a workshop to go with the launch of Blast Off as well as a planetarium show.
Packed with stellar DVD extras including an original National Geographic featurette on space travel and in-depth documentary on the animation process plus more, Tom and Jerry: Blast Off to Mars will be available to own at $19.
The mission will blast off from the Baikonur cosmodrome in Russia on April 28.
From that point a light rocket (which could carry tourists) might blast off from the aircraft into space.
Astronaut to Blast Off Aboard New Space Attraction at Walt Disney World
Were very pleased to be on our way back to the moon after 25 years," program scientist Mr Joseph Boyce told a news conference after the blast off.
EDT, a Boeing Delta II rocket will blast off from Launch Pad A of Space Launch Complex 17 to safely send CONTOUR on its scientific pursuit of at least two comets.
Alex Chavez followed with a single and David Madrigal bunted to load the bases, setting up Mah's 390-foot blast off Eddie Baeza, the Parrots' highly touted ace.
PDT, a Boeing Delta II rocket will blast off from Space Launch Complex 2 West and thunder into space to place Aqua into a Sun-synchronous orbit.
San Luis Obispo answered three plays later on an 11-yard touchdown run by Scott Garrison, set up by Matt McCormick's 58-yard blast off left tackle.