Webster’s Revised Unabridged Dictionary · 1913
Electrotonic
E·lec′tro·ton′ic (·tŏn′ĭk), a. 1. (Physics) Of or pertaining to electrical tension; — said of a supposed peculiar condition of a conducting circuit during its exposure to the action of another conducting circuit traversed by a uniform electric current when both circuits remain stationary. Faraday.
2. (Physiol.) Relating to electrotonus; as, the electrotonic condition of a nerve.