- A chemical that has demonstrated promising biological activity in preliminary assays.
Glossary of Biotechnology for Food and Agriculture . 2015.
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Lead compound — A lead compound (i.e. the leading compound, not lead metal) in drug discovery is a chemical compound that has pharmacological or biological activity and whose chemical structure is used as a starting point for chemical modifications in order to… … Wikipedia
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Lead poisoning — Classification and external resources An X ray demonstrating the characteristic finding of lead poisoning, dense metaphyseal lines. ICD 10 T … Wikipedia
Lead glass — Swarovski flacon. Lead glass is a variety of glass in which lead replaces the calcium content of a typical potash glass. Lead glass contains typically 18–40 weight% lead(II) oxide (PbO), while modern lead … Wikipedia
lead processing — Introduction preparation of the ore for use in various products. Lead (Pb) is one of the oldest metals known, being one of seven metals used in the ancient world (the others are gold, silver, copper, iron, tin, and mercury). Its low… … Universalium
Lead (disambiguation) — For the Wikipedia guideline for the lead paragraph(s) of an article, see . Lead can have several meanings and pronunciations, usually related to either the chemical element lead or the verb to lead . Meanings associated with the chemical element… … Wikipedia
lead — 1. v. & n. v. (past and past part. led) 1 tr. cause to go with one, esp. by guiding or showing the way or by going in front and taking a person s hand or an animal s halter etc. 2 tr. a direct the actions or opinions of. b (often foll. by to, or… … Useful english dictionary
lead chromate — noun a poisonous chromate of lead used as a pigment in paint • Hypernyms: ↑chromate * * * ˈled noun : a chromate of lead: as a. : the poisonous normal salt PbCrO4 that occurs naturally as the mineral crocoite, that is obtained synthetically as a… … Useful english dictionary
lead — lead1 /leed/, v., led, leading, n., adj. v.t. 1. to go before or with to show the way; conduct or escort: to lead a group on a cross country hike. 2. to conduct by holding and guiding: to lead a horse by a rope. 3. to influence or induce; cause:… … Universalium
lead — I. verb (led; leading) Etymology: Middle English leden, from Old English lǣdan; akin to Old High German leiten to lead, Old English līthan to go Date: before 12th century transitive verb 1. a. to guide on a way especially by going in advance b.… … New Collegiate Dictionary