Vena \Ve"na\, n.; pl. Ven[ae]. [L. See Vein.]

A vein.

Vena cava; pl. Ven[ae] cav[ae]. [L., literally, hollow vein.]

(Anat.) Any one of the great systemic veins connected directly with the heart.

Vena contracta. [L., literally, contracted vein.]

(Hydraulics) The contracted portion of a liquid jet at and near the orifice from which it issues.

Vena port[ae]; pl. Ven[AE] port[ae]. [L., literally, vein of the entrance.]

(Anat.) The portal vein of the liver. See under Portal.

Source: Webster's Revised Unabridged Dictionary (1913)