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mesosome

[mez-uh-sohm, mes-, mee-zuh-, -suh-] /ˈmɛz əˌsoʊm, ˈmɛs-, ˈmi zə-, -sə-/
noun
1.
the anterior portion of the abdomen in arachnids.
2.
a whorled structure extending inward from the cell membrane in Gram-positive bacteria and containing enzymes for cellular respiration.
Origin of mesosome
1955-1960
1955-60; meso- + -some3
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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