English: fish pass
Welsh: ysgol bysgod
Subject: Amgylchedd
English definition: Laddered structure on waterfalls etc. to assist fish to ascend.
Welsh definition: Adeiledd ar raeadr neu ored i bysgod fel samwn neu sewin allu ei ddringo i fynd i fyny'r afon i silio.
Plural: ysgolion pysgod