rudiments >> ˈruːdɪm(ə)nt
Definition: [noun] the first principles of (a subject).
Example: she taught the girls the rudiments of reading and writing
Definition: [noun] an undeveloped or immature part or organ, especially a structure in an embryo or larva which will develop into an organ, limb, etc.
Example: the fetal lung rudiment
Definition: [noun] a basic pattern used by drummers, such as the roll, the flam, and the paradiddle.