insertion

Plural: insertions

Noun

• a message (spoken or written) that is introduced or inserted
  • "with many insertions in the margins"
• the act of putting one thing into another
• The act of inserting, or something inserted.
• The distal end of attachment of a muscle to a bone that will be moved by the muscle.
• The addition of a nucleotide to a chromosome by mutation.
• The process of going from subcritical to prompt critical.

Synonyms

interpolation, introduction, intromission

Antonyms

antonym(s) of, deletion