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( k´y p ng´´ch r) (KEY) , technique of traditional Chinese medicine, in which a number of very fine metal needles are inserted into the skin at spe...
(both: är´nôlt bök´l n) (KEY) , 1827–1901, Swiss painter. Most of his life was spent in Italy. With Feuerbach he led the group of painters know...
(äl´br kht ältdôr´f r) (KEY) , 1480–1538, German painter and engraver. He served as city architect of Regensburg, where much of his life was sp...
(bärt l m ´ äm-mänä´t ) (KEY) , 1511–92, Italian sculptor and architect. He studied under Bandinelli in Florence and assisted Jacopo Sansovin...
(ält ky ´r dä ts v´y ) (KEY) , c.1330–c.1395, Italian painter, follower of Giotto. He worked in Verona and then Padua. His frescoes in the chur...
in chemistry, minimum energy needed to cause a chemical reaction. A chemical reaction between two substances occurs only when an atom, ion, or molecul...