Definitions
from The American Heritage® Dictionary of the English Language, 4th Edition
 Archimedes 287?212 B.C. Greek mathematician, engineer, and physicist. Among the most important intellectual figures of antiquity, he discovered formulas for the area and volume of various geometric figures, applied geometry to hydrostatics and mechanics, devised numerous ingenious mechanisms, such as the Archimedean screw, and discovered the principle of buoyancy.
from Wiktionary, Creative Commons Attribution/ShareAlike License
 proper n. An ancient Greek mathematician, physicist and engineer
 proper n. A large lunar impact crater on the eastern edges of the Mare Imbrium
from the GNU version of the Collaborative International Dictionary of English
 n. An extinct genus of Bryzoa characteristic of the subcarboniferous rocks. Its form is that of a screw.
from The Century Dictionary and Cyclopedia
 n. A genus of extinct cryptostomatous bryozoans having a broadly spiral zoarium coiled about a solid vertical axis. It is very abundant in the Lower Carboniferous limestones.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
 n. Greek mathematician and physicist noted for his work in hydrostatics and mechanics and geometry (287212 BC)
Etymologies
Examples

Darlington teamed up with visualist Emmanuel Biard and engineer David Leonard to create the machine, which goes by the name Archimedes.

The son, Archimedes, is a good mathematician but kept at home to help his father, and, when Sternow at last relents and sends him off to university, it is too late: Archimedes works, but also drinks excessively, undermines his health, and dies of a fever.

Pi, the number that expresses the ratio of a circle's circumference over its diameter, was first calculated in ancient times, and sometimes is called Archimedes' Constant, for an ancient Greek mathematician who calculated an approximate value for the number.

Really, though, they ought to be called Archimedes problems.

This massively ambitious project, originally funded by Kaiser Permanente, now makes up the core of a private company, also called Archimedes, that Eddy operates from the 29th floor of a San Francisco office tower.

R C. WINTHROP in a lecture entitled Archimedes and Franklin, from which we quote as follows:

After two thousand years it occurred to one of our fellowcountrymen that the screw of Archimedes, which is used to raise water, might be employed in forcing down gases; it suffices, without making any change, to turn it from right to left, instead of turning it, as when raising water, from left to right.
System of Economical Contradictions: or, the Philosophy of Misery

She was then fitted with the same kind of screw as the Archimedes, that is, a doubleheaded screw of half a convolution.

This study, employing a complex and detailed mathematical model known as Archimedes, simulated

That the melting of floating ice does not raise the water level is known as Archimedes 'principle.
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