differing in phase by a quarter of a cycle; two-phase.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for quarter-phase
Historical Examples of quarter-phase
Teyr and her moon Luhin, both in quarter-phase from here, moved steadily apart in the viewers.Tulan
Carroll Mather Capps
The several phases may be entirely independent, and such was the case with the early polyphase Quarter-phase alternators.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012