hydroponics |
The scientific study of the growth of plants in an artificial liquid nutrient medium instead of in soil. (09 Oct 1997) |
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hydroposia |
Water-drinking, a characteristic of animals that ordinarily drink water. Origin: hydro-+ G. Posis, drinking (05 Mar 2000) |
hydropote |
<biology> A cell or cell group found on the lower epidermis of some species such as Nymphaea. These cells are thought to function in the uptake of ions from the water. (09 Oct 1997) |
hydrops |
<disease> A name applied to recurrent vertigo accompanied by ringing in the ears (tinnitus) and deafness. A dysfunction of the semi-circular canals (endolymphatic sac) in the inner ear. Symptoms include dizziness, hearing loss (one-sided), vertigo, nausea, vomiting and abnormal eye movements. Treatment includes anticholinergics, antihistamines and other medications which relieve vertigo. Diuretic medications have been used to lower pressure in the endolymphatic sac. (27 Sep 1997) |
hydrops articuli |
<medicine> An effusion of watery liquid into the cavity of a joint. Origin: NL. See Hydro-, 1, and Arthrosis. Source: Websters Dictionary (01 Mar 1998) |
hydrops foetalis |
<embryology, paediatrics> A severe form of the genetic disorder thalassaemia in which all four alpha chain polypeptides making up the haemoglobin molecule (the protein which transports oxygen in the body) are missing due to a defect in the gene which codes for them. As a result, affected individuals die at or before birth. (09 Oct 1997) |
hydrops ovarii |
A collection of fluid in the ovary. Synonym: hydrops ovarii. (05 Mar 2000) |
hydrops pericardii |
An obsolete term for pericardial effusion. (05 Mar 2000) |
hydrops tubae |
Accumulation of serous fluid in the fallopian tube, often an end result of pyosalpinx. Synonym: hydrops tubae. Origin: hydro-+ G. Salpinx, trumpet Intermittent hydrosalpinx, intermittent discharge of watery fluid from the oviduct. Synonym: hydrops tubae profluens. (05 Mar 2000) |
hydrops tubae profluens |
intermittent hydrosalpinx |
hydropyonephrosis |
Presence of purulent urine in the pelvis and calices of the kidney following obstruction of the ureter. Origin: hydro-+ G. Pyon, pus, + nephrosis (05 Mar 2000) |
hydroquinol |
<chemistry> A white crystalline substance, C6H4(OH)2, obtained by the reduction of quinone. It is a diacid phenol, resembling, and metameric with, pyrocatechin and resorcin. Synonym: dihydroxy benzene. Origin: Hydro-, 2 + quinone. Source: Websters Dictionary (01 Mar 1998) |
hydroquinone |
<chemistry> A white crystalline substance, C6H4(OH)2, obtained by the reduction of quinone. It is a diacid phenol, resembling, and metameric with, pyrocatechin and resorcin. Synonym: dihydroxy benzene. Origin: Hydro-, 2 + quinone. Source: Websters Dictionary (01 Mar 1998) |
hydrorchis |
A collection of water (hydrocele) in the testis, as in the tunica vaginalis or along the spermatic cord. Origin: hydro-+ G. Orchis, testicle (05 Mar 2000) |
hydrorheostat |
A rheostat in which resistance to the flow of electric current is provided by water. (05 Mar 2000) |