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1. The cardinal number equal to 1045.
2. Chiefly British The cardinal number equal to 1084.
[Latin quattuordecim, fourteen (quattuor, four; see kwetwer- in Indo-European roots + decem, ten; see deci-) + (m)illion.]
quat′tu·or·de·cil′lionth adj.adv. & n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
quat•tu•or•de•cil•lion(ˈkwɒt uˌɔr dɪˈsɪl yən, ˈkwɒt yu-)
n., pl. -lions, (as after a numeral) -lion, n.
1. a cardinal number represented in the U.S. by 1 followed by 45 zeros, and in Great Britain by 1 followed by 84 zeros.adj.
2. amounting to one quattuordecillion in number.
[1900–05; < Latin quattuordec(im) fourteen (quattuor four + -decim, comb. form of decem ten) + -illion (as in million)]
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