E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Calling.
A vocation, trade, or profession. The allusion is to the calling of the apostles by Jesus Christ to follow Him. In the legal profession persons must still be called to the bar before they can practise.
1
Effectual calling. An invitation to believe in Jesus, rendered effectual by the immediate operation of the Holy Ghost.
-o-pe, 4 syl., Greek, 
o
, p
, beautiful voice].
