- a pale blind eel-like salamander, Proteus anguinus, of underground streams in SE Europe, that retains its larval form throughout its life: family ProteidaeSee also mud puppy
C20: from German
Examples from the Web for olm
Jakob spoke on until we became wild to go up to the Olm too.
Onkel Johann—there is no one so deep as he in cattle—says that every blade of grass on our Olm is worth half a pint of milk.
The olm, or proteus, is found only in the underground lakes of Carniola and one or two other parts of Central Europe.The Animal World, A Book of Natural History
The Olm was very extensive, lying on a mountain-platform which was only bare of snow for about three months in the year.
The Alpine caravansary was hardly settled at the Olm when the air became intensely hot and oppressive.