As nouns the difference between terms and dygogram
is that terms is while dygogram is (nautical) a chart showing the horizontal variation in the magnetic force acting on a ship's compass needle by the iron within the ship, as a function of course steered.
terms
English
Noun
(head)
Statistics
*
----
dygogram
English
Noun
(
en noun)
(nautical) A chart showing the horizontal variation in the magnetic force acting on a ship's compass needle by the iron within the ship, as a function of course steered