Monothelitism n 1: the theological doctrine that Christ had only one will even though he had two natures (human and divine); condemned as heretical in the Third Council of Constantinople
Monothelism \Mo*noth"e*lism\, Monothelitism \Mo*noth"e*li*tism\, n. [Cf. F. monoth['e]lisme, monoth['e]litisme.] The doctrine of the Monothelites. [1913 Webster]