Definition of second messenger in English:

second messenger

noun

Physiology
  • A substance whose release within a cell is promoted by a hormone and which brings about a response by the cell.

    • ‘This enzyme is abundantly expressed in the lung tissue and thereby stabilizes the second messenger.’
    • ‘Calcium is involved as a second messenger in many reactions of the plant cell to external signals.’
    • ‘Fatty acids function as second messengers and coregulators of gene transcription.’
    • ‘When the neurotransmitter binds to its receptor, it activates the second messenger system.’
    • ‘Examples of proteins and second messengers that appear to act in multiple response pathways are also described.’