In*ser"tion (?), n. [L. insertio: cf. F. insertion. See Insert.]

1. The act of inserting; as, the insertion of scions in stocks; the insertion of words or passages in writings.

2. The condition or mode of being inserted or attached; as, the insertion of stamens in a calyx.

3. That which is set in or inserted, especially a narrow strip of embroidered lace, muslin, or cambric.

4. (Anat.) The point or part by which a muscle or tendon is attached to the part to be moved; -- in contradistinction to its origin.

• the act of inserting, or something inserted
  
• (anatomy) the point of attachment of a muscle to a bone
  
• (genetics) the addition of a nucleotide to a chromosome by mutation