es·me·ral·da \ˌezməˈraldə\noun (pluralesmeraldaoresmeraldas) Usage: usually capitalized Etymology: American Spanish, from Spanish, emerald, from (assumed) Vulgar Latin smaragda; from the emeralds found in its territory — more at emerald : a now extinct language family of the coast of Ecuador • es·me·ral·dan\|ezmə|raldən\adjective, usually capitalized