† acorn.

1650 W. Charleton in tr. J. B. van Helmont Ternary of Paradoxes (new ed.) Prolegomena sig. D^v In many wounds, all the vigor of Nature cannot suffice to the ejection of that forein Acor, that hath once made an encroachment upon her tender confines.

1683 S. Haworth Descr. Duke's Bagnio 67 It immediately dints that Fermental Acor imprest upon the Synovia of the Joynts..: For this Distemper, as wel as the forementioned Maladies, is chiefly determined and specificated by Acid Particles fixt and coagulated upon different Humours and Parts.

1693 W. Harris Exact Enq. Acute Dis. Infants 6 But also, almost all Liquors that do tend to putrefaction, do naturally contract an acor or sharpness.

1726 N. B. Farrier's & Horseman's Dict. 3/1 Acor is a Sourness at the Stomach contracted by Indigestion, from whence arise Flatulencies and sour Belchings.

1754 R. Brookes Gen. Pract. Physic (ed. 2) I. 160 Those who escape are not freed by a cutaneous Excretion, but by large Sweats, breathing a stinking Acor, or by critical Fluxes of the Belly.

1843 Brit. & Foreign Med. Rev. 16 409 Each ferment is indeed united to a certain matter, as the fermentum stomachi to the acor of the stomach.