quat·tu·or·de·cil·lion 
(kwŏt′-ôr-dĭ-sĭlyən, kwŏt′y-)
(kwŏt′-ôr-dĭ-sĭlyən, kwŏt′y-)n.
1. The cardinal number equal to 1045.
2. Chiefly British The cardinal number equal to 1084.
[Latin quattuordecim, fourteen (quattuor, four; see kwetwer- in the Appendix of Indo-European roots + decem, ten; see DECI-) + (M)ILLION.]
quat′tu·or·de·cillion adj.
quat′tu·or·de·cillionth adj.adv. & n.