the body of descendants of a common ancestor, as a family or stock.
any of the different lines of ancestry united in a family or an individual.
a group of plants distinguished from other plants of the variety to which it belongs by some intrinsic quality, such as a tendency to yield heavily; race.
an artificial variety of a species of domestic animal or cultivated plant.
a variety, esp. of microorganisms.
ancestry or descent.
hereditary or natural character, tendency, or trait: a strain of insanity in a family.