birch camphor
Betulin Bet"u*lin, n. [L. betula birch tree.] (Chem.) a term originally applied to a substance obtained as a resin or tar by extraction from the outer bark of the common European white birch ({Betula alba}); now referring to the chemical compound ({C30H50O2}) having a cyclopentanophenanthrene ring system, which is the main constituent of that extract, and which may be obtained crystalline; -- called also {birch camphor}. --Watts. [1913 Webster +PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Betula alba — Betulin Bet u*lin, n. [L. betula birch tree.] (Chem.) a term originally applied to a substance obtained as a resin or tar by extraction from the outer bark of the common European white birch ({Betula alba}); now referring to the chemical compound …   The Collaborative International Dictionary of English

  • Betulin — Bet u*lin, n. [L. betula birch tree.] (Chem.) a term originally applied to a substance obtained as a resin or tar by extraction from the outer bark of the common European white birch ({Betula alba}); now referring to the chemical compound… …   The Collaborative International Dictionary of English

  • C30H50O2 — Betulin Bet u*lin, n. [L. betula birch tree.] (Chem.) a term originally applied to a substance obtained as a resin or tar by extraction from the outer bark of the common European white birch ({Betula alba}); now referring to the chemical compound …   The Collaborative International Dictionary of English

  • betulin(ol) —   n. resinous extract of birch bark; birch camphor …   Dictionary of difficult words

  • List of trees and shrubs by taxonomic family — The following is a list of trees and shrubs of high notoriety. Taxonomic families for the following trees and shrubs are listed in alphabetical order, likewise the genera and closely related species.=GYMNOSPERMS= =CONIFERS= Araucariaceae: The… …   Wikipedia

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  • Japan — /jeuh pan /, n. 1. a constitutional monarchy on a chain of islands off the E coast of Asia: main islands, Hokkaido, Honshu, Kyushu, and Shikoku. 125,716,637; 141,529 sq. mi. (366,560 sq. km). Cap.: Tokyo. Japanese, Nihon, Nippon. 2. Sea of, the… …   Universalium

  • Cinnamomum — Camphor Laurel Cinnamomum camphora Scientific classification Kingdom …   Wikipedia

  • betula — European white birch, bark and leaves of B. alba (family Betulaceae); native to Europe, northern Asia, and North America, north of Pennsylvania. It contains betulin (b. camphor), betuloresinic acid, volatile oil, saponins, betulol (sesquiterpine… …   Medical dictionary

  • Asia — /ay zheuh, ay sheuh/, n. a continent bounded by Europe and the Arctic, Pacific, and Indian oceans. 2,896,700,000; ab. 16,000,000 sq. mi. (41,440,000 sq. km). * * * I Largest continent on Earth. It is bounded by the Arctic Ocean, the Pacific Ocean …   Universalium

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