- any lichen of the genus Umbilicaria.
Origin of rock tripe
First recorded in 1850–55; allegedly so called in reference to the appearance of the thallus
Also called tripe-de-roche.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rock tripe
On reaching the rock, they saw what Norman had meant by the words tripe de roche (rock-tripe).
Not even a bit of rock-tripe—in these parts the last resource of starving men—could be met with.
There was one cable Burl had missed, hidden by rock-tripe and mould in a depressed part of the cliff-top.The Forgotten Planet
- Canadian any of various edible lichens, esp of the genus Umbilicaria, that grow on rocks and are used in the North as a survival food