The difference between Finger joint and Spline

Finger joint as a noun (construction, woodworking):

A joint, usually glued, in which multiple integral protrusions are fit into mating slots, used especially for manufacturing long moldings.

Spline as a noun:

Long thin piece of metal or wood.

Spline as a noun:

A rectangular piece that fits grooves like key seats in a hub and a shaft, so that while the one may slide endwise on the other, both must revolve together.

Spline as a noun:

A flexible strip of metal or other material, that may be bent into a curve and used in a similar manner to a ruler to draw smooth curves between points.

Spline as a noun (mathematics, computing):

Any of a number of smooth curves used to join points.

Spline as a noun (woodworking):

A strip of wood or other material inserted into grooves in each of two pieces of wood to provide additional surface for gluing.

Spline as a verb (mathematics, computing):

To smooth (a curve or surface) by means of a spline.

Spline as a verb (engineering):

To fit with a spline.

Spline as a verb (engineering):

To fasten to or together with a spline.