【医】 double-edge nails
both; double; even; twin; two; twofold
【化】 dyad
【医】 amb-; ambi-; ambo-; bi-; bis-; di-; diplo-; par
along; edge; predestined relationship; reason
【医】 acies; border; brim; edge; fringe; labrum; limbus; margin; margines
margo; ora; rim
armour; first; nail; shell
【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx