Definify.com
Webster 1913 Edition
Raca
‖
Ra′ca
(rā′kȧ)
, Adj.
 [Gr. 
ῥακά
, from Chaldee rēkā
.] A term of reproach used by the Jews of our Savior’s time, meaning “worthless.” 
Whosoever shall say to his brother, 
Raca
, shall be in danger of the council. Matt. v. 22.
Webster 1828 Edition
Raca
R'ACA
,Noun.