Definitions For Subcontrary

Noun

SUBCONTRARY (plural SUBCONTRARYs) (logic) Either of a pair of propositions at least one of which must be true

Adjective

(not comparable) Contrary in an inferior degree. (geometry) Having, or being in, a contrary order; said of a section of an oblique cone having a circular base made by a plane not parallel to the base, but so inclined to the axis that the section is a circle; applied also to two similar triangles when so placed as to have a common angle at the vertex, the opposite sides not being parallel. {{quote-book, en, year=1852, author=John Mulcahy, title=Principles of Modern Geometry, passage=Two planes drawn through the vertex of the cone parallel to the plane of the circular base , and that of a subcontrary section, are called by Chasles the cyclic planes of the cone}} (logic) Denoting the relation of opposition between the particular affirmative and particular negative. Of these both may be true and only one can be false.