nyala: spiral-horned South African antelope with a fringe of white hairs along back and neck
even-toed ungulate: placental mammal having hooves with an even number of functional toes on each foot
erythromycin: an antibiotic (trade name Erythrocin or E-Mycin or Ethril or Ilosone or Pediamycin) obtained from the actinomycete Streptomyces erythreus; effective against many Gram-positive bacteria and some Gram-negative