in·ser·tion noun \in-ˈsər-shən\
: the part of a muscle by which it is attached to the part to be moved—compare origin 2
: the mode or place of attachment of an organ or part
a : a section of genetic material inserted into an existing gene sequence b : the mutational process producing a genetic insertion
—in·ser·tion·al \-shnəl, -shən-əl\ adjective
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