diphyllic adjective3 •liking two substances, for example oil and water, surfactant. •Containing tissue derived from two different germinal layers.This led to the view that it is one of two things - viz., either a diphyllic teratoma or a true teratoma. — 1915 •Having two phylloid lobes.The first lateral lobe is diphyllic, having two nearly equal-sized secondary lobes. The second lateral lobe is monophyllic having a single secondary lobe which lies on the side toward the venter. — 1933 formsmore diphyllic · most diphyllic