adamantine
Stedman's Medical Dictionary: A Practical Medical Dictionary · 1920 · p. 1
(ad-S-man'tin) [G. aaamantmos, very hard.] Exceedingly hard; specifically relating " to the enamel of the teeth.
Bu kavram başka kaynaklarda da geçiyor
French-English and English-French Commercial Dictionary (1918)
The American Illustrated Medical Dictionary (1913)
The American Dictionary and Cyclopedia (1910)
An Illustrated Encyclopaedic Medical Dictionary (1891)
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