The Collaborative International Dictionary of English v.0.48:

Sequacious \Se*qua"cious\, a. [L. sequax, -acis, fr. suquit to
   follow. See Sue to follow. ]
   1. Inclined to follow a leader; following; attendant.
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            Trees uprooted left their place,
            Sequacious of the lyre.               --Dryden.
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   2. Hence, ductile; malleable; pliant; manageable.
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            In the greater bodies the forge was easy, the matter
            being ductile and sequacious.         --Ray.
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   3. Having or observing logical sequence; logically consistent
      and rigorous; consecutive in development or transition of
      thought.
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            The scheme of pantheistic omniscience so prevalent
            among the sequacious thinkers of the day. --Sir W.
                                                  Hamilton.
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            Milton was not an extensive or discursive thinker,
            as Shakespeare was; for the motions of his mind were
            slow, solemn, and sequacious, like those of the
            planets.                              --De Quincey.
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