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Pronunciation varies by accent · noun
A key, observable feature that is useful for identification of species in the field..
Fieldmarks are its color, its forehead and a very much back-curving dorsal fin.
Use field mark when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Field mark means A key, observable feature that is useful for identification of species in the field..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Fieldmarks are its color, its forehead and a very much back-curving dorsal fin.
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