either of two children born of the same mother at the same time
either of people or things closely related or connected, or very like each other
"The polished surface twinned his face and chest in reverse"
"This fact is coupled to the other one"
"Matchmaker, can you match my daughter with a nice young man?"
"The student was paired with a partner for collaboration on the project"
Every twin female..is not necessarily barren, even when the other calf is a male.
出自： W. C. L. Martin
His twin daughters, Alma and Sophie.
出自： C. Morley
Ah, my cruel cruel step-dame, who hath twinn'd our love for aye.