home / medterms medical dictionary a-z list / granular leukocyte definition Medical Definition of Granular leukocyte Granular leukocyte: A type of white blood cell filled with microscopic granules (tiny sacs) containing enzymes that digest microorganisms. Granular leukocytes-- they are better known as granulocytes -- are part of the innate immune system and have somewhat non specific, broad-based activity. They do not respond exclusively to specific antigens, as do B-cells and T-cells.
Single (music) In music, a single or record single is a type of release, typically a song recording of fewer tracks than an LP record, an album or an EP record. This can be released for sale to the public in a variety of different formats.
A-side and B-side. On vinyl, double A-sided singles had one song on either side of the record, while double B-sides contained two songs on the same side (on the B-side, making three songs in all). When such singles were introduced in the 1970s, the popular term for them was maxi single, though this term is now used more ambiguously for a variety of formats.