Definition of ecdysone in US English:

ecdysone

noun

Biochemistry
  • A steroid hormone that controls molting in insects and other arthropods.

    • ‘This checkpoint may be controlled by signaling through the steroid hormone ecdysone.’
    • ‘Two hormones in particular drive these fundamental processes: ecdysone and juvenile hormone.’
    • ‘A pulse of the steroid hormone ecdysone at the onset of metamorphosis triggers the rapid transformation of a flat leg imaginal disc into an immature adult leg, largely through coordinated changes in cell shape.’
    • ‘Consequently, both the onset and the termination of disc growth are determined by the joint action of ecdysone and juvenile hormone.’
    • ‘Larval molting in Drosophila, as in other insects, is initiated by the coordinated release of the steroid hormone ecdysone, in response to neural signals, at precise stages during development.’

Origin

1950s: from Greek ekdusis ‘shedding’ + -one.

Pronunciation

ecdysone

/ˈekdəˌsōn/