[ˈruːdɪm(ə)nt], (Noun)

Definitions:
- the first principles of (a subject)
(e.g: she taught the girls the rudiments of reading and writing)

- an undeveloped or immature part or organ, especially a structure in an embryo or larva which will develop into an organ, limb, etc.
(e.g: the fetal lung rudiment)

- a basic pattern used by drummers, such as the roll, the flam, and the paradiddle


Phrases:

Origin:
mid 16th century: from French, or from Latin rudimentum, from rudis ‘unwrought’, on the pattern of elementum ‘element’