Acronym for Partial-Constant Angular Velocity, also called partial CAV, P-CAV a method of writing data to CD-R and CD-RW media. Using artial-Constant Angular Velocity means that when data is recorded to the inner part of the CD, the disc rotates at a constant speed but the data is delivered at a a variable speed. On the outer portion of the CD, the data is recorded at a constant rate but the speed at which the disc turns varies.