† tactismn.
/ˈtaktɪz(ə)m/ Biology. Obsolete.
The motile response of a living organism to an external stimulus.
ΘΚΠ
the world > life > biology > biological processes > movement > movement in response to stimuli > [noun]
heterokinesy1678
taxis1899
tactism1902
1902 Fortn. Rev. June 1013 By his revelations of the rôle of the ‘trophisms’ and ‘tactisms’ Dr. Loeb drove boldly into the domain of mental phenomena.
1907 S. Dewey tr. F. Le Dantec Nature & Origin of Life 163 An observer conversant with the results of all these experiments in tactisms knows that the movements he observes in living bodies through the microscope are due to the colloid and chemical reactions of the mobile beings and the medium.
1912 A. Tridon tr. Y. Delage & M. Goldsmith Theories Evol. 164 Others..attribute differentiation to the influence of the various tropisms and tactisms.
This entry has not yet been fully updated (first published 1933; most recently modified version published online September 2018).
<
n.1902