(military) A military officer who commands a brigade. / (US, military) A one star general.

(chemistry) The molecular formula of a class of compounds in which actual numbers are represented by x, n etc., and organic radicals are represented as Rₙ

(biology) The branch of biology that deals with the transmission and variation of inherited characteristics, in particular chromosomes and DNA.

(genetics) The set of rules by which the sequence of bases in DNA are translated into the amino acid sequence of proteins.

(originally) A generation of people whose future is uncertain; a lost generation.

The generation of people born between the early 1980s and mid 1990s (with 1996 births cited as the last Millennial year), following Generation X.

(genetics, evolutionary theory) An overall shift of allele distribution in an isolated population, due to random fluctuations in the frequencies of individual alleles of the genes.

A person with a broad general knowledge, especially one with more than superficial knowledge in several areas and the ability to combine ideas from diverse fields. / (medicine) A general practitioner.

(genetics) A scientist who studies genes. / (medicine) A physician who diagnoses, treats, and counsels patients with genetic disorders or syndromes.

(taxonomy) The scientific name of a genus. / (pharmacology, pharmacy) The name given to a drug that is used to identify it irrespective of trademark etc.