strain

A group of bacteria or viruses that are genetically distinct from other groups of the same species.

A group of cultivated plants or domestic animals of the same species that have distinctive characteristics but are not considered a separate breed or variety.

The collective descendants of a common ancestor; a race, stock, line, or breed.

Any of the various lines of ancestry united in an individual or a family; ancestry or lineage.

A kind or sort.

An inborn or inherited tendency or character.

An inherent quality; a streak.