Question

what name is given to the speed in a specified direction

Answer 1

velocity is the  name  given to the speed in a specified direction
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as velocity is an vector quantity it will have both magnitude and direction and negative sign just indicates the direction 

Answer 2

Answer:

Velocity is the name given to the speed in a specified direction.

Explanation:

Speed is described by distance traveled with time. Direction is not conveyed in speed. When both value and direction are required then velocity is used. Velocity gives direction to the speed, as it is a vector quantity.

E.g. A racing bike moving on a perfectly circular track. So consider that bike moves at constant speed but velocity is different at each instant as rider has to constantly change his direction.