Initialism of over-the-horizon backscatter (“a form of radar”).

(uncountable) The default configuration of DNA in cells, right-hand twisting double helix with a significant size difference between major groove and minor groove, and approximately 10 base pairs per twist.

(pharmacology, informal) Clipping of amphotericin B.

plural of B-list

(slang) The city of Baltimore, Maryland, United States.

Short for benefit corporation.

plural of B corporation

plural of B-sider

A song released as a B-side.

(computing) Initialism of Supplementary Private Use Area-B (plane 16 of Unicode, containing the 65,536 code points from U+100000 through U+10FFFF).