insertion

noun

• 1 [mass noun] the action of inserting something:he didn’t notice the insertion of the envelope into his pocket

• 2a thing that is inserted, in particular:
• an amendment or addition inserted in a text: omissions and insertions which do not affect the sense an annual insertion in the local telephone directory
• each appearance of an advertisement in a newspaper or periodical.
• an ornamental section of cloth or needlework inserted into a garment.

• 3 Anatomy & Zoology the place or manner of attachment of an organ: close to the point of leaf insertion
• the place or manner of attachment of a muscle to the part which it moves:the names of the muscles and their insertions on the eyeball