[ 'nastɪk ]
■ adjective Botany (of the movement of plant parts) caused by an external stimulus but unaffected in direction by it.
Origin
early 20th cent.: from Gk nastos 'squeezed together' + -ic .
NASTIC
Meaning of NASTIC in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004