invoke

Concise Oxford English Dictionary © 2008 Oxford University Press:
invoke /ɪnˈvəʊk/

▶verb

• 1 call on (a deity or spirit) in prayer or as a witness.

  ■ summon (a spirit) by charms or incantation.

• 2 appeal to as an authority or in support of an argument.

  ■ call earnestly for.

• 3 Computing cause (a procedure) to be carried out.

– derivatives
invoker noun.

– origin C15 (earlier (ME) as invocation): from Fr. invoquer, from L. invocare.