modulant

plural modulants

1. Something that serves to modify something else.

   Essential oils are known immune modulants, and because they are so concentrated, it is reasonable to assume that, in certain cases, some oils may be too strong for some systems.

   2001, Suzanne Catty, Hydrosols: The Next Aromatherapy

   1 more example

   These senses are not restrictive in the languages which have both stems, and we are not warranted in suggesting more than that there may have been a distinctive value to each of the terminal consonant modulants, but that in the drift along the ages and across the seas the distinction has in some places become obscured.

   1911, William Churchill, The Polynesian Wanderings, page 368