Definition

(Adjective) Of substances: Having a glutinous or gluey character.

In Context

“Fresh slicks of black, viscous oil continued to wash up on to the beaches of north-west Spain yesterday as the fuel left behind by the sunken tanker Prestige began to spread south down the coast.”

Giles Tremlett, “Wildlife Suffers As Oil Spreads Along Spanish Coast,” The Guardian, November 21, 2002.