Male berry (Bot.), a kind of coffee. See Pea berry. -- Male fern (Bot.), a fern of the genus Aspidium (A. Filixmas), used in medicine as an anthelmintic, esp. against the tapeworm. Aspidium marginale in America, and A. athamanticum in South Africa, are used as good substitutes for the male fern in medical practice. See Female fern, under Female. -- Male rhyme, a rhyme in which only the last syllables agree, as laid, afraid, dismayed. See Female rhyme, under Female. - - Male screw (Mech.), a screw having threads upon its exterior which enter the grooves upon the inside of a corresponding nut or female screw. -- Male thread, the thread of a male screw.