• WordNet 3.6
    • adj dissatisfactory not up to expectations "a disappointing performance from one who had seemed so promising"
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Webster's Revised Unabridged Dictionary
    • a Dissatisfactory Causing dissatisfaction; unable to give content; unsatisfactory; displeasing. "To have reduced the different qualifications in the different States to one uniform rule, would probably have been as dissatisfactory to some of the States, as difficult for the Convention."
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Century Dictionary and Cyclopedia
    • dissatisfactory Not satisfactory; unsatisfying; displeasing.
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Chambers's Twentieth Century Dictionary
    • adj Dissatisfactory dis-sat-is-fak′tor-i causing dissatisfaction: unable to give content
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In literature:

Yes, indeed; don't you find them coupon meals very dissatisfactory?
"The Girl with the Green Eyes" by Clyde Fitch

In science:

While this may seem natural, albeit slightly dissatisfactory, in experiments probing the nature of quantum mechanics, it is incompatible with device independent applications for which the violation of a Bell inequality is a necessary condition to assure e.g. security of certain tasks [4–6].
Feasibility of loophole-free nonlocality tests with a single photon