a.1.Having, or consisting of, three members.
References in periodicals archive ?
The author classifies the idiom as a trimembral nominal sentence (literally, "As for Satan, it is again Satan").
Marine Sergeant Jonathan Mozingo, amputee of the left leg below the knee, and Marine Corporal Todd Love, trimembral amputee of both legs above the knee and left arm below the elbow, as they compete head-to-head with many current Spartan champions and other top athletes.