Webster's Revised Unabridged Dictionary · 1913

Rotundity

Rotundity , noun

[Latin rotunditas: compare French rotondité.]

1.
The state or quality of being rotu{not transcribed}; roundness; sphericity; circularity.
Smite flat the thick rotundity o'the world! — Shakespeare
2.
Hence, completeness; entirety; roundness.
For the more rotundity of the number and grace of the matter, it passeth for a full thousand. — Fuller
A boldness and rotundity of speech. — Hawthorne