A description, usually graphical, showing the major participants or components in a system and their interrelationships.

The doctrine, in the Roman Catholic Church, that the Virgin Mary was conceived biologically but free from original sin. / December 8th (The Feast of the Immaculate Conception of Mary).

An album of music where the content follows an overall theme or narrative.

(medicine) The human fetus, placenta and other such by-products of a miscarriage or abortion.

A diagram showing the relationships among concepts, with the concepts drawn in boxes that are connected with labelled arrows denoting the relationships between concepts, such as "is a", "gives rise to", "results in", "is required by," or "contributes to".

A uterine growth consisting of some degenerate mass instead of a foetus.

(poker) The notion that a player should have higher standards to play against someone who has already bet (i.e., the player should play tighter, play fewer hands).

plural of operating concept

(automotive) An automobile which is not available for retail sale and which is usually only a mock-up having limited functionality, but which may be displayed at auto shows to represent design ideas under consideration for future vehicles.

plural of proof of concept