(immunology) The process by which a specific antigen only activates its counter-specific lymphocyte, usually a B cell, so that particular cell is induced to produce many clones of itself for antibody production.

(ecology) A theory involving natural selection based on quality.

(ecology) A theory involving natural selection based on quantity.

plural of select vestry

A board consisting of representatives of the ratepayers, as opposed to the common vestry or assembly of all the ratepayers.

A committee made up of a number of parliamentary or legislative members appointed to deal with particular areas or issues beyond the authority or capacity of a standing committee.

plural of select meeting

(religion) A Quaker meeting of ministers and elders.

plural of clonal selection

A form of natural selection in which extreme values for a trait are favored over intermediate values, causing subpopulations of a single species within the same habitat to develop different adaptations.