In zoology|lang=en terms the difference between metridinid and metridiid
is that metridinid is (zoology) any member of the metridinidae while metridiid is (zoology) any member of the metridiidae.
As nouns the difference between metridinid and metridiid
is that metridinid is (zoology) any member of the metridinidae while metridiid is (zoology) any member of the metridiidae.