What does "butterwort" mean?

Any plant of the insectivorous genus Pinguicula.

What is a synonym for "butterwort"?

Common synonyms include: pinguicula.

noun

noun ·Rare ·Advanced level

Noun

1
Any plant of the insectivorous genus Pinguicula.
"As he climbed up through the golden gorse he would look for orchids amongst the commoner cotton grass, bog asphodel and butterwort[.]"
2
any of numerous carnivorous bog plants of the genus Pinguicula having showy purple or yellow or white flowers and a rosette of basal leaves coated with a sticky secretion to trap small insects wordnet
3
common butterwort (Pinguicula vulgaris)

"As he climbed up through the golden gorse he would look for orchids amongst the commoner cotton grass, bog asphodel and butterwort[.]"

From butter + wort: perhaps from the ability of the leaves to coagulate milk, or from their peculiar sliminess.