| hydrocarbons, aromatic | Organic compounds composed exclusively of carbon and hydrogen. They are unsaturated hexagonal ring structures with a closed conjugated system of double bonds that gives them the characteristic chemical properties of the parent aromatic hydrocarbon, benzene. (12 Dec 1998) |
|---|---|
| hydrocarbons, cyclic | Organic compounds composed exclusively of carbon and hydrogen forming a closed ring that may be either alicyclic or aromatic. (12 Dec 1998) |
| hydrocarbostyril | <chemistry> A white, crystalline, nitrogenous hydrocarbon, C9H9NO, obtained from certain derivatives of cinnamic acid and closely related to quinoline and carbostyril. Origin: Hydro-, 2 + carbostyril. Source: Websters Dictionary (01 Mar 1998) |
| hydrocarburet | <chemistry> Carbureted hydrogen; also, a hydrocarbon. Origin: Hydro-, 2 + carburet. Source: Websters Dictionary (01 Mar 1998) |
| hydrocaulus | Origin: NL, fr. Gr. "ydwr water + a stalk. <zoology> The hollow stem of a hydroid, either simple or branched. Source: Websters Dictionary (01 Mar 1998) |
| hydrocele | An accumulation of serous fluid in a sac-like cavity adjacent the testicle, a swelling due to the accumulation of serous fluid in the tunica vaginalis of the testis or in the spermatic cord. (27 Sep 1997) |
| hydrocele colli | A cyst formed by secretion into a persistent duct or fissure of the neck; when it involves lymph channels, it is usually a lymphangioma. Synonym: hydrocele colli. (05 Mar 2000) |
| hydrocele feminae | Accumulation of serous fluid in the labium majus or in Nuck's canal. Synonym: hydrocele muliebris, Nuck's hydrocele. (05 Mar 2000) |
| hydrocele muliebris | Accumulation of serous fluid in the labium majus or in Nuck's canal. Synonym: hydrocele muliebris, Nuck's hydrocele. (05 Mar 2000) |
| hydrocele spinalis | A congenital limited defect in the spinal column, characterised by the absence of the vertebral arches through which the spinal membranes and spinal cord may protrude. (27 Sep 1997) |
| hydrocelectomy | Excision of a hydrocele. Origin: hydrocele + G. Ektome, excision (05 Mar 2000) |
| hydrocephalic | Relating to, or connected with, hydrocephalus, or dropsy of the brain. Source: Websters Dictionary (01 Mar 1998) |
| hydrocephalocele | Protrusion, through a cleft in the skull, of brain substance expanded into a sac containing fluid. Synonym: encephalocystocele, hydrocephalocele, hydroencephalocele. Origin: hydr-+ G. Enkephalos, brain, + kele, tumour (05 Mar 2000) |
| hydrocephaloid | <medicine> Resembling hydrocephalus. <medicine> Hydrocephaloid affection, the group of symptoms which follow exhausting diarrhea in young children, resembling those of acute hydrocephalus, or tubercular meningitis. Origin: Hydrocephalus. Source: Websters Dictionary (01 Mar 1998) |
| hydrocephalous | Having hydrocephalus. "Hydrocephalous offspring." Source: Websters Dictionary (01 Mar 1998) |