You Do Need power plug adapter while traveling from Martinique to Uruguay.

Here is Why You Need An Adapter

The outlet and plug type used in Uruguay are C, F and L and in Martinique are C, D and E. This is how they look like.

Martinique

In Martinique, outlets of type C, D and E are in use.

Type C

Type D

Type E

Uruguay

In Uruguay, outlets of type C, F and L are in use.

Type C

Type F

Type L