Centrum, centri. Cic.A centre or point in the very middes of a circle. A knurre in tunber or stone, marring the workemans toole.Centrum solis. Plin.
Lewis and Short: Latin dictionary
centrum, i, n., = ke/ntron (a prickle, sharp point). I. Centrum circini, the stationary foot of the compasses, around which the other is carried in making a circle, Vitr. 3, 1; 9, 5.—Hence, II.Meton.A.The middle point of a circle, the centre, Vitr. 3, 1; 9, 1; Plin. 2, 15, 13, 63; 2, 19, 17, 81 et saep.—In plur.: solis terraeque centra, Plin. 18, 29, 69, 281 (in Cic. Tusc. 1, 17, 40, used as a Greek word).—B.A kernel, a hard knot in the interior of wood, precious stones, etc., Plin. 16, 39, 76, 198; 37, 2, 10, 28; 37, 9, 39, 120 al.
