† metaptosisn.

Origin: A borrowing from Greek. Etymon: Greek μετάπτωσις.

Etymology: < ancient Greek μετάπτωσις change (in Hellenistic Greek frequent in the medical writer Galen) < μετα- meta- prefix + πτῶσις fall (see ptosis n.). N.E.D. (1906) gives the pronunciation as (metăptō^u·sis) /mɛtəpˈtəʊsɪs/.

Obsolete.

1. Medicine. Change in the nature of a disease; an instance of this.

ΚΠ

1684 tr. S. Blankaart Physical Dict. 196 Metaptosis is the degenerating of one Disease into another, as of a Quartane Ague into a Tertian; and on the contrary, of an Apoplexy into a Palsy.

1773 D. Garrick Let. 11 June in Private Corr. (1831) I. 544 Without endangering you of a metaptosis, or transition into other dreadful disorders.

1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Metaptosis, old term for a change, or passing of one disease into another.

2. Logic. A change in the truth value of a proposition (from false to true, or from true to false). rare.Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 in Cent. Dict. Metaptosis...In logic, the change of a proposition from being false to being true.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online June 2021).

单词	metaptosis
释义	† metaptosisn. Origin: A borrowing from Greek. Etymon: Greek μετάπτωσις. Etymology: < ancient Greek μετάπτωσις change (in Hellenistic Greek frequent in the medical writer Galen) < μετα- meta- prefix + πτῶσις fall (see ptosis n.). N.E.D. (1906) gives the pronunciation as (metăptō^u·sis) /mɛtəpˈtəʊsɪs/. Obsolete. 1. Medicine. Change in the nature of a disease; an instance of this. ΚΠ 1684 tr. S. Blankaart Physical Dict. 196 Metaptosis is the degenerating of one Disease into another, as of a Quartane Ague into a Tertian; and on the contrary, of an Apoplexy into a Palsy. 1773 D. Garrick Let. 11 June in Private Corr. (1831) I. 544 Without endangering you of a metaptosis, or transition into other dreadful disorders. 1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Metaptosis, old term for a change, or passing of one disease into another. 2. Logic. A change in the truth value of a proposition (from false to true, or from true to false). rare.Apparently only attested in dictionaries or glossaries. ΚΠ 1890 in Cent. Dict. Metaptosis...In logic, the change of a proposition from being false to being true. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online June 2021). < n.1684
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