rotundatio
From LSJ
ὄρνιθι γὰρ καὶ τὴν τότ᾽ αἰσίῳ τύχην παρέσχες ἡμῖν → for it was by a good omen that you provided that past fortune to us
Latin > English
rotundatio rotundationis N F :: rounding; circumference
Latin > English (Lewis & Short)
rŏtundātĭo: ōnis, f. rotundo,
I a making round, a rounding: linea rotundationis, i. e. the circumference, Vitr. 1, 6 fin.; 3, 1; 10, 11.
Latin > French (Gaffiot 2016)
rŏtundātĭō, ōnis, f. (rotundo), action d’arrondir, forme circulaire : Vitr. Arch. 1, 6.
Latin > German (Georges)
rotundātio, ōnis, f. (rotundo), das Rundmachen, die Rundung, der Kreis, Vitr.: linea rotundationis, Kreislinie, Vitr.