boil ‧ er S3 /ˈbɔɪlə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ boil , ↑ boiler ; verb : ↑ boil ; adjective : ↑ boiling ]
a container for boiling water that is part of a steam engine, or is used to provide heating in a house
boil ‧ er S3 /ˈbɔɪlə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ boil , ↑ boiler ; verb : ↑ boil ; adjective : ↑ boiling ]
a container for boiling water that is part of a steam engine, or is used to provide heating in a house
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012