E word meaning and definition

[noun] the 5th letter of the Roman alphabet
[noun] a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
[noun] the base of the natural system of logarithms
[noun] the cardinal compass point that is at 90 degrees
[noun] a radioactive transuranic element produced by bombarding plutonium with neutrons

\E\ ([=e]). 1. The fifth letter of the English alphabet. Note: It derives its form, name, and value from the Latin, the form and value being further derived from the Greek, into which it came from the Ph[oe]nician, and ultimately, probably, from the Egyptian. Its etymological relations are closest with the vowels i, a, and o, as illustrated by to fall, to fell; man, pl. men; drink, drank, drench; dint, dent; doom, deem; goose, pl. geese; beef, OF. boef, L. bos; and E. cheer, OF. chiere, LL. cara. Note: The letter e has in English several vowel sounds, the two principal being its long or name sound, as in eve, me, and the short, as in end, best. Usually at the end of words it is silent, but serves to indicate that the preceding vowel has its long sound, where otherwise it would be short, as in m[=a]ne, c[=a]ne, m[=e]te, which without the final e would be pronounced m[a^]n, c[a^]n, m[e^]t. After c and g, the final e indicates that these letters are to be pronounced as s and j; respectively, as in lace, rage. See Guide to Pronunciation, [sect][sect] 74-97. 2. (Mus.) E is the third tone of the model diatonic scale. E[flat] (E flat) is a tone which is intermediate between D and E.
\E-\ A Latin prefix meaning out, out of, from; also, without. See {Ex-}.

Morse code: .