Definition of octopamine in English:



mass nounBiochemistry
  • A compound which can accumulate in nerves as a result of the use of monoamine oxidase inhibitors and cause a rise in blood pressure.

    An amine related to noradrenaline; chemical formula: HOC₆H₄CHOHCH₂NH₂

    • ‘The larvae were induced to glow spontaneously by means of the neurotransmitter octopamine applied directly on the glow organs.’
    • ‘Both octopamine and serotonin inhibit bursting activity, suggesting that neurosecretion is controlled by these neuromodulators.’
    • ‘But perfusion of the exposed lantern tissue of the P. versicolor male with octopamine does not induce scintillation, only a glow.’
    • ‘The transmitter is octopamine, common in invertebrate systems.’
    • ‘The bioluminescent response to octopamine was inhibited in the presence of the NO scavenger carboxy-PTIO.’


1940s: from octopus (from which it was first extracted) + amine.