neurohumor; neurohumour
Technical term in physiology referring to a chemical substance produced by neurons that acts on other cells, such as neurotransmitters or neurohormones.
Neurohumors are substances that bridge the nervous system and the endocrine system.
神経伝達物質 specifically refers to neurotransmitters that act at synapses, while 神経体液 is a broader term including any neuron-derived chemical messenger.
Compound of 神経 (nerve) and 体液 (body fluid), likely a calque from English 'neurohumor'.