| 单词 |
imperforate |
| 释义 |
imperforate, a.|ɪmˈpɜːfərət|
[f. im-2 + perforate.]
Not perforated; having no perforation, foramen, or opening. Chiefly in scientific and technical use; in Anat. said of parts of the body normally having an opening, when congenitally closed by malformation or in special cases; also of persons or animals so affected.
1673Ray Journ. Low C., Venice 200 One of these Glass-bubbles was perforated with a little hole..the other..was imperforate. 1739S. Sharp Operat. Surg. (R.), Sometimes children are born imperforate. 1851–6Woodward Mollusca 100 The whorls are closely coiled, leaving only a pillar of shell, or columella, in the centre: such shells are said to be imperforate. 1857Bullock Cazeaux' Midwif. 44 Sometimes the hymen forms a complete imperforate Membrane. 1877L. Jewitt Half-hours among Eng. Antiq. 180 The use of these large imperforate beads..remains a mystery. 1887L. Heitzmann tr. C. Heitzmann's Anat. IV. 80 The clitoris..has two Corpora cavernosa, a Glans which is imperforate.
b. Of a sheet of postage, revenue, or other stamps: Not having the individual stamps separated by rows of perforations; hence of a stamp having the margin entire and not denticulated, as in ‘perforated’ specimens.
1885E. B. Evans Philatelic Handbk. 118 [1d. stamp] Watermark a Small Crown; imperforate. 1893Daily News 28 July 5/2 Fine copies of the Canadian sixpenny [postage-stamp] ‘imperforate’. |
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