(stars) Initialism of horizontal branch. / (slang, seduction community) A hot babe, someone pickup artists try to seduce. (Usually followed by a number in the 1-10 scale of physical beauty, e.g. HB10.)

Initialism of Hansestadt Bremen. The German city of Bremen. (Used on licence plates and informally in other contexts.)

hard black (describing a pencil that makes lighter marks than a grade B, but darker marks than a grade H pencil).

plural of HB

(UK, historical) HBOS, a former British bank and insurance company.

Having two of the same allele at a locus, or base at a SNP, where both copies are from a single ancestor strand.

Having two of the same allele at a locus, or base at a SNP, where both copies are from a single ancestor strand.

plural of HBCU

(Canada, historical) Hudson's Bay Company, a major Canadian retailer and former British Crown corporation on the North American fur trade.

plural of hbar