Lewis Short
spectus (noun M) : id.
* Look, appearance, aspect: spectu sine praepositione Pacuvius in Duloreste usus est, cum ait: spectu protervo ferox, Fest. s. h. v. p. 330 Müll.; Pac. Fragm. Trag. v. 147 Rib.
Charlton T. Lewis, Charles Short, A Latin Dictionary