Retraction
Retraction or retract(ed) may refer to:

Academia
Retraction in academic publishing, withdrawals of previously published academic journal articles

Mathematics
Retraction (category theory)
Retract (group theory)
Retraction (topology)

Human physiology
Retracted (phonetics), a sound pronounced to the back of the vocal tract, in linguistics
Retracted tongue root, a position of the tongue during the pronunciation of a vowel, in phonetics
Sternal retraction, a symptom of respiratory distress in humans
Retraction (kinesiology), an anatomical term of motion

Linguistics
A process which has led to the Neo-Shtokavian accentuation, also known as "Neo-Shtokavian metatony"

See also
Retractor (disambiguation)