thunder snake: small reddish wormlike snake of eastern United States
diapsid: reptile having a pair of openings in the skull behind each eye
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