資料來源 : Webster's Revised Unabridged Dictionary (1913)
Dip \Dip\, n.
1. The action of dipping or plunging for a moment into a
liquid. ``The dip of oars in unison.'' --Glover.
2. Inclination downward; direction below a horizontal line;
slope; pitch.
3. A liquid, as a sauce or gravy, served at table with a
ladle or spoon. [Local, U.S.] --Bartlett.
4. A dipped candle. [Colloq.] --Marryat.
{Dip of the horizon} (Astron.), the angular depression of the
seen or visible horizon below the true or natural horizon;
the angle at the eye of an observer between a horizontal
line and a tangent drawn from the eye to the surface of
the ocean.
{Dip of the needle}, or {Magnetic dip}, the angle formed, in
a vertical plane, by a freely suspended magnetic needle,
or the line of magnetic force, with a horizontal line; --
called also {inclination}.
{Dip of a stratum} (Geol.), its greatest angle of inclination
to the horizon, or that of a line perpendicular to its
direction or strike; -- called also the {pitch}.