n.
Pronunciation: - ' rek-triks
Function: noun
Inflected Form: plural -trix · es \ -trik-s ə z \ also -tri · ces \ -tr ə - ˌ s ē z \
Etymology: Medieval Latin, feminine of Late Latin director, from Latin dirigere
Date: 1622
1 archaic : DIRECTRESS
2 : a fixed curve with which a generatrix maintains a given relationship in generating a geometric figure specifically : a straight line the distance to which from any point of a conic section is in fixed ratio to the distance from the same point to a focus