hub

US /hʌb/
UK /hʌb/
"hub" picture
1.

cubo

the central part of a wheel, rotating on or with the axle, and from which the spokes radiate

:
The bicycle wheel's hub was greased for smoother rotation.
O cubo da roda da bicicleta foi lubrificado para uma rotação mais suave.
The spokes connect from the rim to the hub.
Os raios conectam do aro ao cubo.
2.

centro, polo

the effective center of an activity, region, or network

:
London is a major financial hub.
Londres é um grande centro financeiro.
The airport serves as a regional travel hub.
O aeroporto serve como um centro de viagens regional.