noun
chemical messenger
Technical term in biology and neuroscience for substances such as hormones, neurotransmitters, or pheromones that carry signals between cells or organisms.
神経伝達物質は化学伝達物質の一種です。
Neurotransmitters are a type of chemical messenger.
神経伝達物質 specifically refers to neurotransmitters, while 化学伝達物質 is a broader category that includes hormones and other signaling molecules.
Compound of 化学 (chemistry) + 伝達 (transmission) + 物質 (substance). A modern technical term likely calqued from English 'chemical messenger'.