parahormone means A substance that is a product of ordinary metabolism and not produced for a specific purpose, but acts like a hormone in modifying the activity of some distant organ, as in the case of carbon dioxide acting on the respiratory centre. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From para- + hormone.
noun
- A substance that is a product of ordinary metabolism and not produced for a specific purpose, but acts like a hormone in modifying the activity of some distant organ, as in the case of carbon dioxide acting on the respiratory centre.