a combining form meaning “middle,” used in the formation of compound words:
combining form
middle or intermediate: mesomorph

word-forming element meaning “middle, intermediate, halfway,” sometimes mes- before vowels, comb. form of Greek mesos “middle, in the middle; middling, moderate; between” (see medial (adj.)).

meso- or mes-


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  • Mesoamerica

    [mez-oh-uh-mer-i-kuh, mes-, mee-zoh-, -soh-] /ˌmɛz oʊ əˈmɛr ɪ kə, ˌmɛs-, ˌmi zoʊ-, -soʊ-/ noun 1. Anthropology, Archaeology. the area extending approximately from central Mexico to Honduras and Nicaragua in which diverse pre-Columbian civilizations flourished. 2. (loosely) . /ˌmɛsəʊəˈmɛrɪkə/ noun 1. another name for Central America n. 1948, from meso- + America.

  • Mesoappendix

    [mez-oh-uh-pen-diks, mes-, mee-zoh-, -soh-] /ˌmɛz oʊ əˈpɛn dɪks, ˌmɛs-, ˌmi zoʊ-, -soʊ-/ noun, plural mesoappendixes, mesoappendices [mez-oh-uh-pen-di-seez, mes-, mee-zoh-, -soh-] /ˌmɛz oʊ əˈpɛn dɪˌsiz, ˌmɛs-, ˌmi zoʊ-, -soʊ-/ (Show IPA). Anatomy. 1. the mesentery of the . mesoappendix mes·o·ap·pen·dix (měz’ō-ə-pěn’dĭks, měs’-) n. The short mesentery of the appendix lying behind the terminal ileum.

  • Mesobenthos

    /ˌmɛzəˈbɛnθəs; ˌmɛsə-/ noun 1. flora and fauna living at the bottom of seas 182 to 914 metres deep

  • Mesobilane

    mesobilane mes·o·bi·lane (měz’ō-bī’lān’, měs’-) n. A colorless compound resulting from the reduction of bilirubin in the tissues. Also called mesobilirubinogen.

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