(chemistry) Pertaining to, or containing, ruthenium; designating those compounds in which it has a lower valence as contrasted with ruthenic compounds.

Alternative form of Moulton

A colony of breeding birds or other animals. / (by extension) A crowded tenement. / (Britain, historical) A place where criminals congregate, often an area of a town or city.

(Australia, New Zealand, informal) Diminutive of kindergarten.