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1. often rudiments
a. A fundamental element, principle, or skill, as of a field of learning: the rudiments of calculus.
b. Something in an incipient or undeveloped form: the rudiments of social behavior in children; the rudiments of a plan of action.
2. Biology An imperfectly or incompletely developed organ or part.
[Latin rudīmentum, from rudis, rough, unformed.]
ru′di·men′tal (-mĕn′tl) adj.
1. (often plural) the first principles or elementary stages of a subject
2. (often plural) a partially developed version of something
3. (Biology) biology an organ or part in its earliest recognizable form, esp one in an embryonic or vestigial state
[C16: from Latin rudīmentum a beginning, from rudis unformed; see rude]
ru•di•ment(ˈru də mənt)
1. Usu., 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. an incompletely developed organ or part.
[1540–50; < Latin rudīmentum early training, initial stage]
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|Noun||1.||rudiment - the elementary stages of any subject (usually plural); "he mastered only the rudiments of geometry"|
basic principle, fundamental principle, fundamentals, basics, bedrock - principles from which other truths can be derived; "first you must learn the fundamentals"; "let's get down to basics"
|2.||rudiment - the remains of a body part that was functional at an earlier stage of life; "Meckel's diverticulum is the rudiment of the embryonic yolk sac"|
body part - any part of an organism such as an organ or extremity