Main entry: alternating
Definition: (of a current) reversing direction
Usage: alternating current
Antonyms: direct
Definition: (of a current) flowing in one direction only
Main entry: alternate, alternating
Definition: occurring by turns; first one and then the other
Usage: alternating feelings of love and hate
Antonyms: noncyclic, noncyclical
Definition: not cyclic
Antonyms: acyclic, open-chain
Definition: having an open chain structure
Antonyms: acyclic
Definition: not cyclic; especially having parts arranged in spirals rather than whorls