\I`so*cli"nal\, Isoclinic \I`so*clin"ic\, a. [Iso- +
Gr. ? to incline.]
Of or pertaining to, or indicating, equality of inclination
or dip; having equal inclination or dip.

{Isoclinal lines} (Magnetism), lines on the earth's surface
   connecting places at which a dipping needle indicates the
   same inclination or dip.