| weld | 1. <botany> An herb (Reseda luteola) related to mignonette, growing in Europe, and to some extent in America; dyer's broom; dyer's rocket; dyer's weed; wild woad. It is used by dyers to give a yellow colour. Alternative forms: woald, wold, and would. 2. Colouring matter or dye extracted from this plant. Origin: OE. Welde; akin to Scot. Wald, Prov. G. Waude, G. Wau, Dan. & Sw. Vau, D. Wouw. Source: Websters Dictionary (01 Mar 1998) |
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| welder's conjunctivitis | Acute keratoconjunctivitis resulting from exposure to intense ultraviolet irradiation. Synonym: actinic conjunctivitis, arc-flash conjunctivitis, flash keratoconjunctivitis, ophthalmia nivalis, snow conjunctivitis, welder's conjunctivitis. (05 Mar 2000) |
| welder's lung | Relatively benign form of pneumoconiosis, associated with welding, resulting from deposit of fine metallic particles in the lung. (05 Mar 2000) |
| weldon's process | <chemistry> A process for the recovery or regeneration of manganese dioxide in the manufacture of chlorine, by means of milk of lime and the oxygen of the air; so called after the inventor. Source: Websters Dictionary (01 Mar 1998) |