Lewis Short
extensĭo (noun F) : extendo.
* A stretching out, extension.
* Lit.: chordarum,Isid. 3, 15, 1.—Esp. of the body or limbs: corporum,Cael. Aur. Acut. 3, 6, 63; id. Tard. 2, 1, 2; 3; 14; 16: crurum,id. ib. 2, 1, 44; so, alarum,a spreading,Vulg. Isa. 8, 8: membranae (in a water-fowl's foot),Ambros. Hexaem. 5, 22, 74: follis nostri corporei,Arn. in Psa. 149.
* Trop., a strain, stretching: mentis = ἔκστασις, i. e. fury, Cael. Aur. Tard. 1, 5, 150.
* A swelling, tumor: extensiones et tubercula in dorso,Veg. 3, 15, 2.
* An extension, extended space: caelorum,Hier. in Isa. 12, 44, § 24.
Charlton T. Lewis, Charles Short, A Latin Dictionary