ˈepəˌthem noun
( -s )
Etymology: Middle English epithima, epithime, from Latin epithema, from Greek, from epitithenai to put on, add, from epi- + tithenai to set, place, put — more at do
1. also ep·i·theme -thēm archaic : an external local application to the body (as a poultice)
2. : a group of thin-walled loosely arranged cells beneath the epidermis of the leaves of many angiosperms that constitutes an internal hydathode
the epithems through which guttation occurs in the tomato leaf