flathead means their Salishan language.
flathead is pronounced /ˈflætˌhɛd/.
Etymology
From flat + head, from the practice of compressing the skull in infancy by artificial means. However, the Salish tribe never practised this custom, the confusion arising from the fact that the early traders felt compelled to adopt the local Indian classification, which considered the prevailing compressed skull of the neighbouring tribes as pointed and the naturally shaped Salish skull by contrast as flat.
name
- Their Salishan language.
noun
- Any fish in the family Platycephalidae.
- A type of screw or bolt designed to fit in a countersink so that it sits flush with a surface.
- Synonym of side valve.
- One of the Salish people of Washington state and British Columbia.