lībrāmentum (noun N) : id.
* That which gives to any thing a downward pressure; weight, gravity.
* Lit.: plumbi,Liv. 42, 63, 4.
* A fall, descent of water: libramentum aquae,Plin. 31, 6, 31, § 57: quod libramentum cum exinanitum est, suscitat et elicit fontem, cum repletum, moratur et strangulat, of a spring that alternately rises and falls,Plin. Ep. 4, 30, 10: inferiore labro demisso ad libramentum modicae aquae receptae in fauces, palpitante ibi lingua ululatus elicitur, of the croaking of frogs,Plin. 11, 37, 65, § 173.
* Transf.
* A level surface, horizontal plane: extremitatem et quasi libramentum, in quo nulla omnino crassitudo sit, * Cic. Ac. 2, 36, 116: sub eodem libramento stare,Sen. Q. N. 1, 12, 1: usque ad libramentum summi fornicis, Ael. Gall. ap. Paul. ex Fest. p. 206 Müll.
* Evenness, equality: ventorum hiemalium et aestivorum,Col. 1, 5, 8
* A straight line: si recto libramento inter solem terrasque media (luna) successit,Sen. Ben. 5, 6, 4: libramentum finale,a boundary line,Amm. 15, 4, 4.
* A weight for balancing or giving motive power (ballista): ferrea manus cum injecta prorae esset, gravique libramento plumbi recelleret ad solum,Liv. 24, 34, 10: arietem admotum nunc saxis ingentibus nunc libramento plumbi gravatum ad terram urguebant,id. 42, 63, 4 Weissenb.: late cladem intulisset, ni duo milites vincla ac libramenta tormento abscidissent,Tac. H. 3, 23.

s. TLL