catatonia definition by American Heritage Dictionary
An abnormal condition variously characterized by stupor, stereotypy, mania, and either rigidity or extreme flexibility of the limbs. It is most often associated with schizophrenia.
Origin: New Latin, from German Katatonie, from Greek katatonos, stretching tight, from katateinein, to stretch tight : kata-, intensive pref.; see cata- + teinein, to stretch; see ten- in Indo-European roots.