Ancient Greek mathematician (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ancient greek mathematician</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for euclid that I've seen before include "Greek mathematician, d. mid-3rd century BC" , "Ancient Greek mathematician" , "Geometrician of the 3rd century BC" , "Greek mathematician c. three hundred BC" , "Alexandrian mathematician" .)
(Other definitions for archimedes that I've seen before include "Greek mathematician ('Eureka')" , "Ancient Greek scientist (of buoyancy principle)" , "'Eureka' scientist" , "Ancient Greek mathematician/inventor" , "Greek physicist" .)