See Also: Lucas(dictionary)
Lucas, George(dictionary)
Lucas, Richard(medicine)
Lucas' groove(medicine)
Lucas, George(encyclopedia)
Lucas, Robert E., Jr.(encyclopedia)
Lucas (as used in expressions)(encyclopedia)
AJ LUCAS Group Limited(finance)
Lucas (Huyghszoon) van Leyden(encyclopedia)
Cranach, Lucas, the Elder(encyclopedia)

port-crayon (iou) and Lucas (iou)


port-crayon (iou)



port-crayon noun. . E18.
[French porte-crayon, from porte- stem of porter carry, PORT verb1 + CRAYON noun.]
An instrument used to hold a crayon for drawing, usu. a metal tube split at the end with a sliding ring so as to secure the crayon.

Lucas (iou)



Lucas noun. M20.
[F. edouard A. Lucas (1842-91), French mathematician.]
Math. Lucas sequence, Lucas series, the sequence of integers 1, 3, 4, 7, . . . , formed in the same way as the Fibonacci numbers; a generalization of this series and the Fibonacci series, in which the nth term un=pun-1-qun-2 (where p and q are constants); Lucas number, a number of the Lucas series.