
• (n.) An Arabian tree (Trichilia emetica). The fruit, which is emetic, is sometimes employed in the composition of an ointment for the cure of the itch.
Found on 
http://thinkexist.com/dictionary/meaning/elcaja/
 El·ca'ja  noun
El·ca'ja  noun [ Arabic ] 
 (Botany) An Arabian tree (
 Trichilia emetica ). The fruit, which is emetic, is sometimes employed in the composition of an ointment for the cure of the itch. 
Found on 
http://www.encyclo.co.uk/webster/E/16
  No exact match found.