In preparation for the main matter; initial, introductory, preparatory.
Any of a series of sports events that determine the finalists
A preparation for a main matter; an introduction.
A relatively minor contest that precedes a major one, especially in boxing
Single, simple; not complex.
Unidirectional.
A monomorphemic word, one without affixes.
An analogue in a space of arbitrary dimensionality of the triangle or tetrahedron; the convex hull of n+1 linearly independent points in n-dimensional space; in other words, the triangle, tetrahedron etc., generalized to an arbitrary number of dimensions.