出典:Wiktionary
From cancer (“crab; cancer”). The use of cancrum as a neuter nominative/accusative form may derive from a misunderstanding of the gender of the masculine accusative singular form cancrum. The term "cancrum oris" first appears in print in Observationes medicae de affectibus omissis (1649) by Arnoldus Boot as a translation of English "mouth canker" in a grammatical context that calls for an accusative singular, and so the form is ambiguous in this source as to the gender of the word.[1] The hypothesis that the name cancrum oris originated in such a blunder is put forth by B. H. Coates (1826)[2], who suggests the error first appeared in John Pearson's Principles of Surgery (1788, London, Chapter 13, Section 1 "Of the Canker of the Mouth", from page 262).[3]
cancrum n (genitive cancrī); second declension
Second-declension noun (neuter).
Case | Singular | Plural |
---|---|---|
Nominative | cancrum | cancra |
Genitive | cancrī | cancrōrum |
Dative | cancrō | cancrīs |
Accusative | cancrum | cancra |
Ablative | cancrō | cancrīs |
Vocative | cancrum | cancra |