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colchicine

(Encyclopedia)colchicine kŏlˈchəsēnˌ [key], alkaloid extracted from plants of the genus Colchicum and especially from the corms of the autumn crocus, Colchicum autumnale (see meadow saffron). The metabolic eff...

nitrogen mustard

(Encyclopedia)nitrogen mustard, any of various poisonous compounds originally developed for military use (see poison gas). Like mustard gas and lewisite, it is a vesicant (blistering agent). In the form of its crys...

mercurous chloride

(Encyclopedia)mercurous chloride, mercury (I) chloride, or calomel, chemical compound, Hg2Cl2, a white crystalline powder, very slightly soluble in water. It was once used medicinally as a purgative, cathartic, li...

phosgene

(Encyclopedia)phosgene fŏsˈjēn [key], colorless poison gas, first used during World War I by the Germans (1915). When dispersed in air, the gas has the odor of new-mowed hay. The gas is highly toxic; when inhale...

rye grass

(Encyclopedia)rye grass, short-lived perennial, leafy, tufted plant belonging to the family Poaceae (grass family). Two species are grown in the United States—Italian rye grass (Lolium multiflorum), the leading h...

Luxembourg, François Henri de Montmorency-Bouteville, duc de

(Encyclopedia)Luxembourg, François Henri de Montmorency-Bouteville, duc de fräNswäˈ äNrēˈ də môNmôräNsēˈbo͞otvēlˈ dük də lüksäNbo͞orˈ [key], 1628–95, marshal of France. Under his cousin, the...

centipede

(Encyclopedia)CE5 Centipede, representative of the class Chilopoda centipede, common name for members of a single class, Chilopoda, of the phylum Arthropoda. Centipedes are the most familiar of the myriapodous ...

Scroggs, Sir William

(Encyclopedia)Scroggs, Sir William, 1623?–1683, English jurist. Educated at Oxford and trained in law at Gray's Inn, he became (1669) a king's sergeant, was made (1676) justice in common pleas through the influen...

tetraethyl lead

(Encyclopedia)tetraethyl lead tĕtˌrəĕthˈəl [key], (C2H5)4Pb, viscous, colorless, poisonous liquid. It is an organometallic compound prepared by reacting ethyl chloride with a sodium-lead alloy. When added to ...

squill

(Encyclopedia)squill, common name for two genera of Old World bulbous plants of the family Liliaceae (lily family). The horticulturists' squill is any plant of the genus Scilla, mostly spring-blooming low herbs wit...