Final answer:
The term for excision of the bladder is 'cystectomy'. It is a surgical procedure where all or a part of the urinary bladder is removed.
Step-by-step explanation:
The word that means excision of the bladder is cystectomy. This surgical procedure involves the removal of all or part of the urinary bladder. The other terms listed refer to different procedures: cystolithotomy is the surgical removal of bladder stones, cystoplasty refers to surgical repair of the bladder, and cystotomy is an incision into the bladder.