Aberrant

departing from the right, normal, or usual course.
deviating from the ordinary, usual, or normal type; exceptional; abnormal.
an aberrant person, thing, group, etc.
Contemporary Examples

Turmeric could have important abilities in healing and preventing brain damage—or this could be an aberrant finding.
Fish Oil, Turmeric, and Ginseng, Oh My! Are ‘Brain Foods’ B.S.? Dr. Anand Veeravagu, MD October 9, 2014

Historical Examples

With an inhuman disregard of caste and custom, the aberrant shadows of the passers-by met and mingled one into another.
Phases of an Inferior Planet Ellen Glasgow

It means that only the parent, which is presumably not immortal, is aberrant.
Greener Than You Think Ward Moore

It appears to “offer a number of transitional characters between the more typical Procyonidae and the aberrant Cercoleptes.”
The Cambridge Natural History, Vol X., Mammalia Frank Evers Beddard

The aberrant forms then cease to be, and the mores become uniform.
Folkways William Graham Sumner

If there has been inheritance here, marked and aberrant variation is also observed.
Prehistoric Man W. L. H. Duckworth

Besides the Lemurs the group includes the aberrant Tarsius and Chiromys.
The Vertebrate Skeleton Sidney H. Reynolds

We have elsewhere shewn that all aberrant forms unite into a circle of their own.
Zoological Illustrations, or Original Figures and Descriptions. Volume III, Second Series William Swainson

There are also some aberrant types which possess complex or multitubercular teeth.
Degeneracy Eugene S. Talbot

Upon the whole, the Zuni seems to be most aberrant of the group—saving the Moqui, which has decided Paduca affinities.
Opuscula Robert Gordon Latham

adjective
deviating from the normal or usual type, as certain animals from the group in which they are classified
behaving in an abnormal or untypical way
deviating from truth, morality, etc
adj.

1798, originally in natural history, from Latin aberrantem (nominative aberrans), present participle of aberrare “to wander away, go astray” (see aberration).

aberrant ab·er·rant (ā-běr’ənt, āb’ər-)
adj.

Deviating from the usual course, as certain ducts, vessels, or nerves.

Deviating from the normal; untrue to type.

Out of place; ectopic.

ab·er’ran·cy n.