diallel

Meanings

Adjective

• Involving crosses between several or all possible combinations.
• Of lines: Meeting and intersecting; not parallel.

Noun

• A set of all possible pairs of items from a specified set of items, especially when used for a study of diallel crosses.
• A form of logical fallacy in which a proposition that is required to prove another proposition can only be proved by means of assuming the truth of the proposition one is trying to prove; circular reasoning.

Origin

• Ancient Greek