ˈmeˌstōm noun
also mes·tom -täm
( -s )
Etymology: German mestom, from Greek mestos full + German -om -ome; akin to Greek medea, mezea, mēdea, plural, male genitals, Middle Irish mess acorns, Welsh mes, plural, acorns, and perhaps to Middle Irish mess fosterling
of a vascular plant : the conducting tissues comprising leptome and hadrome — compare stereome