adj. & n.
--adj.
1. of the four elements.
2 of the powers of nature (elemental worship).
3 comparable to a force of nature (elemental grandeur; elemental tumult).
4 uncompounded (elemental oxygen).
5 essential.
--n. an entity or force thought to be physically manifested by occult means.
Derivatives:
elementalism n. (in senses 1, 2).
Etymology: med.L elementalis (as ELEMENT)