单词 | hilum |
释义 | hilumn.ΘΚΠ the world > space > extension in space > measurable spatial extent > smallness > [noun] > that which is small > a small thing > extremely small thing hilum1659 whatkin1674 scuddick1823 infinitesimal1840 teensy-weensy1872 1659 D. Pell Πελαγος 44 Unhewn Sailors, that have no more than a meer hilum of goodness in them. 2. a. Botany. The point of attachment of a seed to its seed-vessel; the scar on the ripe seed. ΘΚΠ the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > hilum or cicatrix hilum1753 cicatrix1826 cicatricula1828 caruncle1830 omphalodium1832 strophiole1839 omphalode1850 nucleus1861 wound stump1923 1753 Chambers's Cycl. Suppl. Hilum, a word used by botanists to express the blackish spot in beans, commonly called by us the eye of the bean. 1830 J. Lindley Introd. Nat. Syst. Bot. 115 Seeds..with a smooth shining coat, and a broad pale hilum. 1880 A. Gray Struct. Bot. vi. §8. 277 In the simplest form of ovule, hilum and chalaza are one. b. A similar mark on a starch-granule. ΚΠ 1867 J. Hogg Microscope (ed. 6) ii. i. 341 Most of the granules [of starch] have a circular spot, termed the hilum, around which a large number of curved lines arrange themselves. Thesaurus » Categories » c. ‘The aperture in the extine of a pollen grain’ ( New Sydenham Soc. Lexicon). 3. Categories » a. Anatomy. = hilus n. ‘Applied also to certain small apertures and depressions’ ( New Sydenham Soc. Lexicon). Categories » b. Pathology. ‘A term for a small flattened staphyloma of the iris from corneal perforation, in consequence of its likeness to the hilum of the garden bean’ ( New Sydenham Soc. Lexicon). c. A little opening in the statoblast of a sponge. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > aperture in statoblast hilum1887 1887 W. J. Sollas in Encycl. Brit. XXII. 424 [article Sponges] On one side of the capsule is a hilum which leads into the interior. This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022). < |
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