atypical behavior is not the accepted type of response that we expect from children.
Examples of atypical
atypical
Though his route is atypical, he is already making me think he is the real deal.
From the sacbee.com
Only center-right Democrats can succeed outside Kentucky's atypical urban areas.
From the courier-journal.com
Graff's back story may be a tad more exotic than many, but it's hardly atypical.
From the chron.com
His freewheeling approach to dance since then has led him down an atypical path.
From the washingtontimes.com
The punches and counterpunches are not atypical of any heated campaign, he said.
From the lohud.com
Paula Yanakakis, now in her 17th season as head coach, found the scene atypical.
From the boston.com
West Virginia and parts of Virginia are atypical of this region in several ways.
From the en.wikipedia.org
Gonzalez agreeing to such a long-term deal is atypical of a Scott Boras client.
From the denverpost.com
Wednesday was a not-atypical day for the Mountain View, Calif., Internet giant.
From the washingtonpost.com
More examples
Not representative of a group, class, or type; "a group that is atypical of the target audience"; "a class of atypical mosses"; "atypical behavior is not the accepted type of response that we expect from children"
Deviating from normal expectations; somewhat odd, strange, or abnormal; "these days large families are atypical"; "atypical clinical findings"; "atypical pneumonia"; "highly irregular behavior"
An atypical antipsychotic; Not conforming to the normal type; Unusual or irregular
Not usual; often refers to the appearance of precancerous or cancerous cells.
Atypical means something that is irregular or not ordinary.
Literally, "not typical." Exhibits unusual characteristics. For example, atypical hyperplasia is a dangerous increase in the number of breast cells; a sign that breast cancer may develop.
Deviating markedly from the rule or standard; not typical or regular; above or below average.
Not usual or not normal. Atypical cells are abnormal cells. They do not necessarily progress to cancer, but they are known to increase a woman's risk by four to five times.
Atypical means "not typical" or not as usual. It may or may not be a problem, depending on how it is used and to what it is referring.