Principal boy
noun
1.
the leading male role in a pantomime, played by a woman
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noun 1. the main clause.
- Principal-diagonal
noun 1. Mathematics. See under diagonal (def 9). adjective 1. Mathematics. connecting two nonadjacent angles or vertices of a polygon or polyhedron, as a straight line. extending from one edge of a solid figure to an opposite edge, as a plane. 2. having an oblique direction. 3. having oblique lines, ridges, markings, etc. noun 4. […]
- Principal-focus
noun, Optics. 1. focal point (def 1). principal focus noun 1. another name for focal point
- Principal-ideal
noun, Mathematics. 1. the smallest ideal containing a given element in a ring; an ideal in a ring with a multiplicative identity, obtained by multiplying each element of the ring by one specified element.
- Principal-ideal-domain
noun, Mathematics. 1. a commutative integral domain with multiplicative identity in which every ideal is principal.