Pan‐crat″ic (?), a. [Gr. παγκρατήσ all-powerful.] (Opt.) Having all or many degrees of power; having a great range of power; — said of an eyepiece made adjustable so as to give a varying magnifying power.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.