From Hydragogos 4267 water and to bring away). Hydroticus; aquiducus. Hydragogue. Medicines that evacuate much water. In Hippocrates, Epidem. lib. vi. it imports a person affected with dropsy from drinking water.

Hydrargyrum Hydrargyrus

(From Hydrargyrum Hydrargyrus 4269 water, and silver; from its having the appearance of fluid silver.) Quicksilver. This term the college of physicians of London have adopted for the argentum vivum, in their Pharmacopoeia of 1788, and use it for the word mercurius in all the preparations of which this metal forms a part. See Argentum Vivum.


(From Hydrelaeum 4271 aqua, and oleum). A mixture of oil and water. Oribasius and P. AEgineta.


(From Hydrenterocele 4273 water, an intestine, and a tumour). A dropsy of the scrotum.

Vogel describes this disorder as compounded of a dropsy and hernia.


(From Hydroa 4276water). See Boa and Phlyctis. It sometimes means a pustule called alhasef and asef.


(From Hydrocardia 4277 and the heart).

Hildanus invented this word to signify a serous, sanious, or purulent tumour of the pericardium.

Hydrocelodes Ischuria

(From Hydrocelodes Ischuria 4281 aqua, and attended with tumour). A suppression of urine from a rupture of the urethra opening into the scrotum. See Ischuria.

Hydroceratophy Llo

N, (from Hydroceratophy Llo 4287 water,

Hydroceratophy Llo 4288 a horn, and a leaf). See Ceratophyllum.


(From Hydrogaron 4290 and pickle).

Garum diluted with water.


(From Hydrogenium 4292 water, and to become, or to produce,) hydrogen is one of the constituent parts of water, and perhaps of muriatic acid. (See Aer, and Chemia.) Though its gas is unfit for respiration, it is not poisonous. Its effects on the animal economy are not peculiarly striking, but it appears to affect the irritability of the muscular fibre in a considerable degree; and animals killed by it are supposed to putrefy quickly. The latter opinion seems, however, from Chaptal's Experiments, to be founded on a mistaken observation.