*thlipsis*

‖n. [ L., fr. Gr. &unr_;, fr. &unr_; to squeeze out. ] 1. The dropping out or suppression from a word of a consonant, with or without a vowel. [ 1913 Webster ]

2. (Lat. Pros.) The elision of a final m, with the preceding vowel, before a word beginning with a vowel. [ 1913 Webster ]