ekˈthlipsə̇s noun
( plural ecthlip·ses -pˌsēz)
Etymology: Late Latin, from Greek ekthlipsis loss of a sound or letter in a word, squeezing out, from ekthlibein to squeeze out (from ek out of, out — from ex — + thlibein to squeeze, alteration — influenced by Greek thlan to crush, bruise — of Greek — Aeol & Ion — phlibein to squeeze) + -sis; Greek thlan akin to Czech dlasmati to press and perhaps to Sanskrit dṛṣad, dhṛṣad millstone — more at ex- , profligate
Latin prosody : the elision of a final m with a preceding short vowel before a word beginning with h or a vowel