1550s, present participle adjective from alternate (v.). Alternating electric current is taped from 1839.
(of a present) reversing direction
- occurring by turns; very first one and then one other
- of Alternate
(p. pr. & vb. n.) of Alternate
In the red coati, ranging from Surinam to Paraguay, the tail is marked with from seven to nine broad fulvous or rufous rings, alternating with black ones, and tipped with black.