(pharmacology) A drug C₉H₁₃N₃O₃ which inhibits the replication of HIV and is formerly used in the treatment of AIDS, especially in combination with zidovudine. It is a synthetic analog of a pyrimid...

plural of trochee

(evolutionary theory, geology) A volcanic mass extinction at the end of the Permian period 251.9 million years ago.

A male given name from Arabic (Islamic).