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Webster 1913 Edition

Noun.

[L.

sumptuositas

: cf. F.

somptuosité

Expensiveness; costliness; sumptuousness.

[R.]

Sir W. Raleigh.

Noun.

[from sumptuous.] Expensiveness; costliness. [Not in use.]

sumptuosity ‎(countable and uncountable, plural sumptuosities)