What is Rudiment?

Rudiment definition and meaning on Dictionary terms:

Usually rudiments.

  1. the elements or first principles of a subject: the rudiments of grammar.
  2. a mere beginning, first slight appearance, or undeveloped or imperfect form of something: the rudiments of a plan.
Biology. 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.