Insertion and Adding

noun

• A message (spoken or written) that is introduced or inserted.
  • usage: "with the help of his friend's interpolations his story was eventually told"; "with many insertions in the margins"
  • synonyms: interpolation
• The act of putting one thing into another.
  • synonyms: introduction, intromission

• (n.) That which is set in or inserted, especially a narrow strip of embroidered lace, muslin or cambric.
• (n.) The condition or mode of being inserted or attached; as, the insertion of stamens in a calyx.
• (n.) The point or part by which a muscle or tendon is attached to the part to be moved; -- in contradistinction to its origin.
• (n.) The act of inserting; as, the insertion of scions in stocks; the insertion of words or passages in writings.