Relating to or marked by a transition; transitory.
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tran·si·tion·al -'ish-nəl, -'izh-ən-əl adj
1) of, relating to, or characterized by transition
2) of, relating to, or being epithelium (as in the urinary bladder) that consists of several layers of soft cuboidal cells which become flattened when stretched (as when the bladder is distended)
Medical dictionary. 2011.