From ZooTerms (Dictionary of Invertebrate Zoology)
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desmosome (noun; Greek desmos, bond; soma, body): 1. That portion of a cell membrane specialized for adhesion to a neighboring cell.

2. (Arthropoda: Insecta) An attachment area between epidermal and muscle cells; the muscle fibrils of the muscles attach on one side and the epidermal microtubules attach on the other side of the desmosome

See also: hemidesmosome, tonofibrillae.