viscous

adj

Etymology: First attested in 1605. Borrowed from Middle French visqueux and Late Latin viscōsus, from Latin viscum (“birdlime”). Doublet of viscose.

1. Having a thick, sticky consistency between solid and liquid (that is, a high viscosity).

   “[…] The flesh [of the mistletoe berry] is sticky, and forms strings and ribbons between my thumb and forefinger. For the mistletoe, this viscous goop – and by the way, viscous comes to English from viscum – is crucial. The stickiness means that, after eating the berries, birds often regurgitate the seeds and then wipe their bills on twigs – leading to the seeds' getting glued to the tree, where they can germinate and begin the cycle anew.”

2. Of or pertaining to viscosity.

   “viscous coefficient”