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41Mechanical calculator — An old Russian mechanical calculator. A mechanical calculator is a device used to perform the basic operations of arithmetic. Mechanical calculators are comparable in size to small desktop computers and have been rendered obsolete by the advent… …
42bivalve — bivalvular /buy val vyeuh leuhr/, adj. /buy valv /, n. 1. Also called lamellibranch. Zool. any mollusk, as the oyster, clam, scallop, or mussel, of the class Bivalvia, having two shells hinged together, a soft body, and lamellate gills. adj. 2.… …
43Great Seal of the United States — Reverse of the Seal …
44Milton Keynes grid road system — A typical single carriageway grid road, H4 Dansteed Way, looking east from Two Mile Ash. Note the tree lining, the redway cyclepath and the staggered junction for local roads. The Milton Keynes grid road system is a network of national speed… …
45Firewall (construction) — In construction, a firewall is a fire resistance rated wall assembly intended to slow the spread of fire from one side to the other, and are certification listed. Firewalls subdivide a building into separate fire areas, and are located in… …
46Vermont — /veuhr mont /, n. a state of the NE United States: a part of New England. 511,456; 9609 sq. mi. (24,885 sq. km). Cap.: Montpelier. Abbr.: VT (for use with zip code), Vt. * * * State (pop., 2000: 608,827), northeastern U.S. One of the New England… …
47List of Angels in Neon Genesis Evangelion — In the anime and manga Neon Genesis Evangelion, Angels (使徒, Shito?) are beings which attack Tokyo 3 over the course of the story. They are the main antagonist of the series and were designed by Yoshiyuki Sadamoto. Contents …
48chondrichthian — /kon drik thee euhn/, n. any member of the class Chondrichthyes, comprising the cartilaginous fishes. [ < NL, equiv. to chondr CHONDR + Gk ichthýes (pl.) fish] * * * ▪ fish class Introduction class name Chondrichthyes, or Selachii any… …
49Brain — This article is about the brains of all types of animals, including humans. For information specific to the human brain, see Human brain. For other uses, see Brain (disambiguation). A chimpanzee brain The brain is …
50McAlester, Oklahoma —   City   Downtown McAlester …
