Alli is one of the few over-the-counter diet aids that might actually work, according to the Mayo Clinic. The pill is a lower-dosage version of Xenical, consisting of 60 mg of the fat-blocking drug orlistat.
Adjective[edit] tentative â(comparative more tentative, superlative most tentative) Of or pertaining to a trial or trials; essaying; experimental.
1 of the nature of or made or done as a trial, experiment, or attempt; experimental:a tentative report on her findings.  unsure; uncertain; not definite or positive; hesitant:a tentative smile on his face.