Pronunciation: (rOO'du-munt), [key]
1. Usually, rudiments.
a. the elements or first principles of a subject: the rudiments of grammar.
b. a mere beginning, first slight appearance, or undeveloped or imperfect form of something: the rudiments of a plan.
2. Biol.an organ or part incompletely developed in size or structure, as one in an embryonic stage, one arrested in growth, or one with no functional activity, as a vestige.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.