single-phase

[sing-guh l-feyz] /ˈsɪŋ gəlˌfeɪz/
adjective, Electricity
1.
noting or pertaining to a circuit having an alternating current with one phase or with phases differing by 180°.
Origin
1895-1900
British Dictionary definitions for single-phase

single-phase

adjective
1.
(of a system, circuit, or device) having, generating, or using a single alternating voltage