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Thyatira

(Encyclopedia) ThyatiraThyatirathīˌətīˈrə [key], ancient city of Lydia, now Akhisar, Turkey. It was one of the Seven Churches in Asia and was known for its purple dye (Acts 16.14).

Ellesmere Port

(Encyclopedia) Ellesmere Port, town, Cheshire West and Chester, W central England. Ellesmere Port is located on the Manchester Ship Canal near its…

Höchst

(Encyclopedia) HöchstHöchsthökhst [key], industrial district of Frankfurt, in Hesse, central Germany. It is a leading center of the German chemical industry and was formerly the site of the I. G.…

adsorption

(Encyclopedia) adsorption, adhesion of the molecules of liquids, gases, and dissolved substances to the surfaces of solids, as opposed to absorption, in which the molecules actually enter the…

archil

(Encyclopedia) archilarchilärˈkĭl, –chĭl [key] or orchilorchilôrˈ– [key], blue, red, or purple dye extracted from several species of lichen, also called orchella weeds, found in various parts of the…

Hawick

(Encyclopedia) Hawick Hawick hôˈîk [key], town, Scottish Borders, S Scotland, on the Teviot River. The…

catechu

(Encyclopedia) catechucatechukătˈəch&oomacr; [key] or cutch, extract from the heartwood of Acacia catechu, a leguminous tree of the pulse family, native to India and Myanmar. Catechu is a fast…

saffron

(Encyclopedia) saffron, name for a fall-flowering plant (Crocus sativus) of the family Iridaceae (iris family) and also for a dye obtained therefrom. The plant is native to Asia Minor, where for…

sodium thiosulfate

(Encyclopedia) sodium thiosulfate, Na2S2O3, colorless crystalline compound that is more familiar as the pentahydrate, Na2S2O3·5H2O, an efflorescent, monoclinic crystalline substance also called…

madder

(Encyclopedia) CE5 Bluet, Houstonia caerulea, a member of the madder family madder, common name for the Rubiaceae, a family of chiefly tropical and subtropical trees, shrubs, and herbs,…