the act of inserting

the insertion of a coin in a vending machine.

something inserted

an insertion in the middle of a paragraph.

Botany, Zoology .

the manner or place of attachment, as of an organ.

attachment of a part or organ, with special reference to the site or manner of such attachment.

lace, embroidery, or the like, to be sewn at each edge between parts of other material.

Aerospace . injection ( def. 6 ) .

noun

interpolation , injection , interjection , infusion , introduction , inclusion , posting