Webster's Revised Unabridged Dictionary · 1913

Allegation

Allegation ({not transcribed}) , noun

[Latin allegatio, from allegare, allegatum, to send a message, cite; later, to free by giving reasons; ad + legare to send, commission. Compare Allege and Adlegation.]

1.
The act of alleging or positively asserting.
2.
That which is alleged, asserted, or declared; positive assertion; formal averment
I thought their allegation but reasonable. — Steele
3.
(Law) A statement by a party of what he undertakes to prove, -- usually applied to each separate averment; the charge or matter undertaken to be proved.