Толковый словарь английского языка Oxford English Reference - elemental

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)