al·cai·de also al·cay·de 
(ăl-kīdē)
(ăl-kīdē)n.
The commander or governor of a fortress in Spain or Portugal.
[Spanish, from Arabic al-qā'id, the leader : al-, the + qā'id, leader, active participle of qāda, to lead; see qwd in the Appendix of Semitic roots.]