blast

(redirected from blasts)
Also found in: Dictionary, Thesaurus, Legal, Idioms, Encyclopedia, Wikipedia.

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 classic literature ?
Up sprouted also a great many trumpeters; and with the first breath that they drew, they put their brazen trumpets to their lips, and sounded a tremendous and ear-shattering blast, so that the whole space, just now so quiet and solitary, reverberated with the clash and clang of arms, the bray of warlike music, and the shouts of angry men.
She was the mother of Chimaera who breathed raging fire, a creature fearful, great, swift-footed and strong, who had three heads, one of a grim-eyed lion; in her hinderpart, a dragon; and in her middle, a goat, breathing forth a fearful blast of blazing fire.
It was not long before he thought a shriek was borne past him on a blast.
The stranger became silent and seemed overcome with sadness, but another blast from the whistle of the passenger engine aroused him.
The wind suddenly shifted to the northeast, and the remnant of the sea fog melted in the blast.
In a few moments, notwithstanding their wet clothes, the icy blast that blew and the previous scene of terror, these hardy adventurers, with their iron frames, inured to every hardship, threw themselves down, intending to profit by the advice of Athos, who sat at the helm, pensively wakeful, guiding the little bark the way it was to go, his eyes fixed on the heavens, as if he sought to verify not only the road to France, but the benign aspect of protecting Providence.
I am quite benumbed; for the Notch is just like the pipe of a great pair of bellows; it has blown a terrible blast in my face all the way from Bartlett.
The riotous blast shook the casement as if a strong man were striving to force his entrance into the comfortable room.
It is the north fork or branch of the Bighorn River, but bears its peculiar name of the Wind River, from being subject in the winter season to a continued blast which sweeps its banks and prevents the snow from lying on them.
And may those Extracts (Miss Clack fervently hopes) sound as the blast of a trumpet in the ears of her respected kinsman, Mr.
Even in this leafless time of departing February it is pleasant to look at,--perhaps the chill, damp season adds a charm to the trimly kept, comfortable dwelling-house, as old as the elms and chestnuts that shelter it from the northern blast.
When they came to any town or village, or even to a detached house of good appearance, Short blew a blast upon the brazen trumpet and carolled a fragment of a song in that hilarious tone common to Punches and their consorts.