prŏbātĭo (noun F) : probo.
* A trying, proving; a trial, inspection, examination (class.): athletarum probatio,Cic. Off. 1, 40, 144: futura,Cic. Verr. 2, 1, 54, § 142; Varr. R. R. 1, 20, 1: oesypi,Plin. 29, 2, 10, § 36: croci sinceri,id. 21, 6, 17, § 32: pumicis,id. 36, 21, 42, § 155: gemmae recusant limae probationem,id. 37, 13, 76, § 200: equitum,a review,Val. Max. 2, 2, 9.
* In partic.
* Approbation, approval, assent (class.): ob probationem pretium datum,Cic. Font. 4, 17: tale visum nullum esse ut perceptio consequatur, ut autem probatio, multa,i. e. the assent of belief, though not the direct evidence of the senses,id. Ac. 2, 31, 99.
* Proof, demonstration (post-Aug.), Quint. 5, 10, 8: firma,id. 11, 3, 2: potentissimae,id. 5, 10, 103: ad cujus rei probationem immittit indices,Just. 32, 2, 9: oculorum,ocular demonstration,Plin. 2, 2, 2, § 5.
* In partic., in rhet., the third part of a discourse, also called confirmatio or fides orationis, in which the orator enumerates his arguments, Quint. 3, 9, 1.

s. TLL