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top,

toy with a tapering point on which it can be made to spin. Tops were known in antiquity and appeared in Europe during the Middle Ages; they are used today in many different regions of the world by both primitive and advanced societies. The principle of its motion is utilized in the gyroscopegyroscope
, symmetrical mass, usually a wheel, mounted so that it can spin about an axis in any direction. When spinning, the gyroscope has special properties. Many spinning objects exhibit some of these properties; the rotation of the earth about its axis gives it the
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.

top

[täp]
(geology)
(mechanics)
A rigid body, one point of which is held fixed in an inertial reference frame, and which usually has an axis of symmetry passing through this point; its motion is usually studied when it is spinning rapidly about the axis of symmetry.
(particle physics)
The new quantum number associated with the top quark. Also known as truth.
(quantum mechanics)

top

1. short for top gear
2. Cards the highest card of a suit in a player's hand
3. a platform around the head of a lower mast of a sailing vessel, the edges of which serve to extend the topmast shrouds
4. Chem the part of a volatile liquid mixture that distils first
5. the high-frequency content of an audio signal

TOP

TOP

(Technical Office Protocol) A communications protocol for office systems developed in the early 1980s by the Computer Services division of Boeing in Seattle, WA. It is often used in conjunction with MAP, the factory automation protocol developed by GM. TOP is used in the front office, and MAP is used on the factory floor. TOP uses the CSMA/CD access method (Ethernet), while MAP uses token bus.
References in periodicals archive ?
"Today, Iran is among the world's topmost powers in building missiles, radars, armored vehicles and unmanned aerial vehicles (UAVs)," the Iranian defense minister said in an exclusive interview with IRNA, emphasizing that Iran's defense power was meant to send the message of peace and friendship to other nations.
If the topmost growing point is gone, so are its hormones and the lower buds explode into life.
The following year, he was #1 Agent Councilwide and member of the 2011 President's Club, the topmost of three honors presented to agents by the Weichert franchise.
But MrgprA3* neurons which transmit signals from the topmost layer of skin, seem to be itch-only sensors, an international team reports online December 23 in Nature Neuroscience.
Deutsche Post, one of the topmost postal operators in the field has annual revenues exceeding 50bn euros in their latest accounts.
India is one of the important markets in world; it is the topmost on my priority list.'
Summary: DUBAI -- Around 40 per cent of the UAE population is anaemic and thalassemia is the topmost blood disorder in the country, health experts said at the first Emirates Haematology Conference.
Summary: Washington, Feb.8 (BNA) -- There has been compelling evidence that milk is the topmost source of vitamin D.Now a new research suggests that having a glass of milk everyday can keep bowel cancer at bay
The starting player selects a category from his or her topmost card and reads out its value.
Travel Business Review-9 April 2010-Priceline Rated Topmost For Traveller-Generated Hotel Reviews(C)2010 ENPublishing - http://www.enpublishing.co.uk
It's true we constantly form skin cells but mainly in the epidermis, the topmost layer.
The students found and excavated an ilium, the topmost element of the three hip bones, of an unidentified creature that lived approximately 200 million years ago in the Tucumcari area.