Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
visco, āvi, ātum, 1, v. a., to smear, besmear: cum se inter articulorum conjunctiones usu commotionum viscaverit (sanies), Theod. Prisc. 2, 21: spirat et hinc miseri viscantur labra mariti, are glued, smeared, Juv. 6, 463.