Natyashastra
ऋजुस्थितस्य चोर्ध्वाधः क्षेपादाकम्पितं भवेत् । बहुशश्चलितं यच्च तत्कम्पितमिहोच्यते ॥ २०॥
Kampita: When the movements in the Ākampita head are quick and copious the same is called Kampita.
english translation
Rjusthitasya cordhvAdhaH kSepAdAkampitaM bhavet । bahuzazcalitaM yacca tatkampitamihocyate ॥ 20॥
hk transliteration by Sanscript