Lewis Short
(adverb) : introrsum and introrsus (access. form INTROSVS, Inscr. Orell. 4034; v. also introversus), contr. from intro versum.
* Form introrsum.
* Towards the inside, inwards, into: hostem introrsum in media castra accipiunt,Liv. 10, 33.
* Form introrsus.
* Inwards, in, into: ut non facile Introrsus perspici posset,Caes. B. G. 2, 18: reducere aliquid,id. ib. 7, 22: pergit,Tac. A. 2, 25.
* Inwardly, within: foris nitent, introrsus misera sunt,Sen. Vit. Beat. 2, 4; Liv. 25, 21: lacrimae obortae,Ov. M. 13, 539.
Charlton T. Lewis, Charles Short, A Latin Dictionary