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lithium
(Encyclopedia)lithium lĭthˈēəm [key] [Gr.,=stone], metallic chemical element; symbol Li; at. no. 3; interval in which at. wt. ranges 6.938–6.997; m.p. about 180.54℃; b.p. about 1,342℃; sp. gr. .534 at 20...arum
(Encyclopedia) CE5 Jack-in-the-pulpit, Arisaema triphyllum, a member of the arum family arum, common name for the Araceae, a plant family mainly composed of species of herbaceous terrestrial and epiphytic plants...concentration
(Encyclopedia)concentration, in chemistry, measure of the relative proportions of two or more quantities in a mixture. The concentration of a solute is very important in studying chemical reactions because it deter...charcoal
(Encyclopedia)charcoal, substance obtained by partial burning or carbonization (destructive distillation) of organic material. It is largely pure carbon. The entry of air during the carbonization process is control...pepper
(Encyclopedia)pepper, name for the fruits of several unrelated Old and New World plants used as spices or vegetables or in medicine. True pepper is classified in the division Magnoliophyta, class Magnoliopsida,...fluorine
(Encyclopedia)fluorine flo͞oˈərēn, –rĭn [key], gaseous chemical element; symbol F; at. no. 9; at. wt. 18.9984; m.p. −219.6℃; b.p. −188.14℃; density 1.696 grams per liter at STP; valence −1. Fluorin...tapeworm
(Encyclopedia)tapeworm, name for the parasitic flatworms forming the class Cestoda. All tapeworms spend the adult phase of their lives as parasites in the gut of a vertebrate animal (called the primary host). Most ...Grass, Günter
(Encyclopedia)Grass, Günter günˈtər gräs [key], 1927–2015, German novelist, lyricist, artist, and playwright, b. Danzig (now Gdańsk, Poland). Writing from his experience in the Hitler Youth, the German army...seaweed
(Encyclopedia)seaweed, name commonly used for the multicellular marine algae. Simpler forms, consisting of one cell (e.g., the diatom) or of a few cells, are not generally called seaweeds; these tiny plants help to...carbon dioxide
(Encyclopedia)carbon dioxide, chemical compound, CO2, a colorless, odorless, tasteless gas that is about one and one-half times as dense as air under ordinary conditions of temperature and pressure. It does not bur...Browse by Subject
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