▪ I. miosis Path.
(maɪˈəʊsɪs)
Also myosis.
[f. Gr. µύ-ειν to shut the eyes + -osis.]
Contraction of the pupil of the eye.
| 1819 Pantologia. 1875 H. Walton Dis. Eye xxxiii. (ed. 3) 935 Myosis occurs in progressive locomotor ataxy. 1890 Billings Med. Dict. II. 160/2 Miosis (G[erman]), myosis. 1892 A. Duane tr. E. Fuchs's Text-bk. Ophthalm. iv. 257 There is a series of alkaloids which produce either dilatation of the pupil (mydriasis) or its contraction (miosis). [Note] From µείωσις, contraction; hence miosis, and not myosis, as it is generally written (Hirschberg). 1910 Trans. Ophthalm. Soc. XXX. 163 Miosis on the right side was associated with dilatation of the left pupil. 1947 F. B. Walsh Clinical Neuro-Ophthalmology 201 Miosis has already been defined as indicating a pupil 2 mm. or less in diameter. 1964 W. B. Smith Allergy & Tissue Metabolism vii. 78 The pharmacological effects of reserpine administration are: ..miosis (contraction of pupil of the eye), ptosis [etc.]. |
Hence mioˈsitic a.1 and n. = miotic.
| 1855 Dunglison Med. Lex., Myositic, causing contraction of the pupil, as opium. 1874 Garrod & Baxter Mat. Med. 459 Pupil Contractors (Myositics). 1899 Allbutt's Syst. Med. VI. 403 Calabar bean was not..in use as a myositic. |
▪ II. miosis, miostemonous, miotaxy
see mei-.