Definition of ponasterone in English:

ponasterone

Pronunciation /ˌpəʊnəˈstɪərəʊn/ /pəʊˈnastərəʊn/

noun

Biochemistry
  • Any of a group of steroids which act as ecdysones in various arthropods and are found primarily in certain plants, where they have a protective role against insects.

Origin

1960s. From po- (in scientific Latin Podocarpus) + na- (in scientific Latin nakaii, specific epithet) + -sterone. So called because the first ponasterones were isolated from the Japanese podocarp Podocarpus nakaii.