'bowl-shaped' originates from the combination of 'bowl' and 'shaped', where 'bowl' refers to a round, deep dish or basin and 'shaped' indicates the form or outline.

The term 'bowl-shaped' evolved from the simple combination of 'bowl' and 'shaped' in English, maintaining its descriptive nature over time.

Initially, it meant 'having the form of a bowl', and this meaning has remained consistent in modern usage.