The stairs, landings, hallways, or other portions of the public hall through which it is necessary to pass when going from the entrance floor to the other floors of a building.

Synonym of rousong

(idiomatic) Far excelling even the closest contender; not having any worthy competition.

(teratology) Of, relating to, malformations or defects to an embryo or fetus. / (teratology) Causing malformations or defects to an embryo or fetus.