moss
noun /mɒs/
/mɔːs/
[uncountable, countable]Idioms - a very small green or yellow plant without flowers that spreads over wet surfaces, rocks, trees, etc.
enlarge image- moss-covered walls
Word OriginOld English mos ‘bog or moss’, of Germanic origin; related to Dutch mos and German Moos.
Idioms
a rolling stone gathers no moss
- (saying) a person who moves from place to place, job to job, etc. does not have a lot of money, possessions or friends but is free from responsibilities