| hazard | This is a general term for anything which has the ability to cause injury. The hazard associated with a potentially toxic substance is a function of its toxicity and the potential for exposure to the substance. The probability of exposure to the substance is a risk factor. (09 Oct 1997) |
|---|---|
| hazard rate | <statistics> Theoretical measure of the risk of occurrence of an event, e.g., death, new disease, at a point in time. (05 Mar 2000) |
| hazardous substances | Substances which, upon release into the atmosphere, water, or soil, or which, in direct contact with the skin, eyes, or mucous membranes, or as additives to food, cause health risks to humans or animals through absorption, inhalation, or ingestion. The concept includes safe handling, transportation, and storage of these substances. (12 Dec 1998) |
| hazardous waste | Waste products which, upon release into the atmosphere, water or soil, cause health risks to humans or animals through skin contact, inhalation or ingestion. Hazardous waste sites which contain hazardous waste substances go here. (12 Dec 1998) |
| haze | Light vapor or smoke in the air which more or less impedes vision, with little or no dampness; a lack of transparency in the air; hence, figuratively, obscurity; dimness. Origin: Cf. Icel. Hoss gray; akin to AS. Hasu, heasu, gray; or Armor. Aezen, ezen, warm vapor, exhalation, zephyr. Source: Websters Dictionary (01 Mar 1998) |
| hazel | 1. Consisting of hazels, or of the wood of the hazel; pertaining to, or derived from, the hazel; as, a hazel wand. "I sit me down beside the hazel grove." (Keble) 2. Of a light brown colour, like the hazelnut. "Thou hast hazel eyes." 3. <botany> A shrub or small tree of the genus Corylus, as the C. Avellana, bearing a nut containing a kernel of a mild, farinaceous taste; the filbert. The American species are C. Americana, which produces the common hazelnut, and C. Rostrata. See Filbert. 4. A miner's name for freestone. Hazel earth, soil suitable for the hazel; a fertile loam. 5. <ornithology> Hazel grouse, a European grouse (Bonasa betulina), allied to the American ruffed grouse. Hazel hoe, a kind of grub hoe. Witch hazel. See Witch-hazel, and Hamamelis. Origin: OE. Hasel, AS. Haesel; akin to D. Hazelaar, G. Hazel, OHG. Hasal, hasala, Icel. Hasl, Dan & Sw. Hassel, L. Corylus, for cosylus. Source: Websters Dictionary (01 Mar 1998) |
| hazelwort | <botany> The asarabacca. Source: Websters Dictionary (01 Mar 1998) |