Meaning

adjective dividing an animal into right and left halves

adjective relating to or situated in or extending toward the middle

originEtymology tree Proto-Indo-European *me Proto-Indo-European *dʰeh₁-? Proto-Indo-European *-dʰe Proto-Indo-European *médʰi Proto-Indo-European *-os Proto-Indo-European *médʰyos Proto-Italic *meðjos Latin medius Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālis Latin mediālisbor. English medial Borrowed from Latin mediālis (“middle”), from medius (“that is in the middle or midst”) +…

Etymology from Wiktionary, CC BY-SA 3.0