Tangential acceleration and the transverse acceleration?

i'm studying Classical mechanics from Analytical mechanics textbook , and i'm encounter with transverse acceleration in Chapter five The term $\omega \times r'$ is called the transverse acceleration, because it is perpendicular to the position vector r'. It appears as a result of any angular acceleration of the rotating system, that is, if the angular velocity vector is changing in either magnitude or direction, or both. as stated previously , the textbook has not mentioned the tangential acceleration , so is there any difference between the tangential and the transverse acceleration? or he was talking about the same thing?