insertion
noun
in·ser·tion in-ˈsər-shən 
1
: something that is inserted: such as
a
: the part of a muscle that inserts
b
: the mode or place of attachment of an organ or part
c
: embroidery or needlework inserted as ornament between two pieces of fabric
d
: a section of genetic material that is inserted into an existing gene sequence
2
a
: the act or process of inserting
b
: the mutational process producing a genetic insertion
insertional
in-ˈsər-sh(ə-)nəl
adjective 
Example Sentences
Treatment may include the insertion of a tube in his ear. The report contains a number of insertions.
Recent Examples on the Web So in January 2018, Mahon contacted a company representative to learn more about the valve, which has a special method of insertion. 
BostonGlobe.com, 8 Sep. 2022 Others have argued that Trump’s direct insertion into the midterm campaign will only play into Democratic plans to make the election a referendum on the extremism of Trump’s ‘’Make America Great Again,’’ or MAGA, movement. Michael Scherer And Josh Dawsey, BostonGlobe.com, 14 July 2022 Will the insertion of article 55a in the pillar 2 directive be sufficient to get Hungary to drop its veto? Robert Goulder, Forbes, 5 July 2022 Temporary dimpling of the skin can also occur but will settle within five days of insertion. Kirbie Johnson, Allure, 24 Mar. 2022 As a result of Schroder's insertion into the lineup, Christopher played just 9 minutes on Monday night. Rahat Huq, Chron, 18 Feb. 2022 The outside-in framework requires the artificial insertion of a human experimenter who observes this event [see graphic below]. György Buzsáki, Scientific American, 14 May 2022 The ancient practice involves the insertion of thin needles through the skin on specific anatomical points of the body. Donna M. Owens, Baltimore Sun, 9 Apr. 2022 Farther afield, Werllayne Nunes realistically paints an exuberant girl in front of a Brazilian favela transformed from slum to wonderland by the insertion of fanciful gold-leaf domes. Mark Jenkins, Washington Post, 24 June 2022 See More
BostonGlobe.com, 8 Sep. 2022 Others have argued that Trump’s direct insertion into the midterm campaign will only play into Democratic plans to make the election a referendum on the extremism of Trump’s ‘’Make America Great Again,’’ or MAGA, movement. Michael Scherer And Josh Dawsey, BostonGlobe.com, 14 July 2022 Will the insertion of article 55a in the pillar 2 directive be sufficient to get Hungary to drop its veto? Robert Goulder, Forbes, 5 July 2022 Temporary dimpling of the skin can also occur but will settle within five days of insertion. Kirbie Johnson, Allure, 24 Mar. 2022 As a result of Schroder's insertion into the lineup, Christopher played just 9 minutes on Monday night. Rahat Huq, Chron, 18 Feb. 2022 The outside-in framework requires the artificial insertion of a human experimenter who observes this event [see graphic below]. György Buzsáki, Scientific American, 14 May 2022 The ancient practice involves the insertion of thin needles through the skin on specific anatomical points of the body. Donna M. Owens, Baltimore Sun, 9 Apr. 2022 Farther afield, Werllayne Nunes realistically paints an exuberant girl in front of a Brazilian favela transformed from slum to wonderland by the insertion of fanciful gold-leaf domes. Mark Jenkins, Washington Post, 24 June 2022 See More Word History
First Known Use
1539, in the meaning defined at sense 1
Kids Definition
insertion
noun
in·ser·tion in-ˈsər-shən
1
: the act or process of putting in or into
The lock opened upon insertion of a key.
2
: insert entry 2
Medical Definition
insertion
noun
in·ser·tion in-ˈsər-shən
1
: the part of a muscle by which it is attached to the part to be moved compare origin sense 2
2
: the mode or place of attachment of an organ or part
3
a
: a section of genetic material inserted into an existing gene sequence
b
: the mutational process producing a genetic insertion