scleroid

comparative more scleroid · superlative most scleroid

1. biologyHaving a hard texture.

   The shells of nuts are scleroid.

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   This scleroid form , which plays a very important part in the vegetation of Fungi, is only a transitory one; it always proceeds from the filamentous state, and may be compared with the tubers of the Potato, and not with a true subterranean stem; its life is truly latent, and only preserved by the hygrometric nature of its tissue.

   1876, Emmanuel Le Maout, Joseph Decaisne, A General System of Botany, page 950

   The scleroid patches, when present, took no part in the reaction. No new scleroid tissue was produced.

   1911, William Randolph Taylor, “On the Production of New Cell Formations in Plants”, in Contributions from the Botanical Laboratory of the University of Pennsylvania, page 290

   The walls of these scleroid basidia often reach 1 μm or more in thickness and the walls stain deeply with congo red.

   1981, Timothy J. Baroni, A Revision of the Genus Rhodocybe Maire (Agaricales), page 24

2. anatomythickened.

   Pharyngeal walls thick, scleroid.

   1960, Konstantin Ivanovich Skri︠a︡bin, Essentials of Nematodology, page 364

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   Did you find his drums were thickened and scleroid ?

   1953, New York Court of Appeals. Records and Briefs, page 415

plural scleroids

1. The outermost layer of an eyeball.

   The scleroid is a complete sphere; choroid and retina are incomplete externally.

   1978, Alfred Sherwood Romer, Thomas Sturges Parsons, The Vertebrate Body

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   This is caused by the scleroid which turns around the optic nerve, and projects somewhat above it, thus forming, when illuminated, the clear scleroidal margin.

   1860 September 15, Max Kuechler, “The Present State of Ophthalmoscopy”, in The Medical and Surgical Reporter, volume 4, number 24, page 493

   Bone had been found in various organs and tissues, including the dura and pia mater, in the scleroid and choroid, in the tonsils, in the thyroid, the lung and pleura and other serous membranes.

   1914, Arpad G. Gerster, “On the Fomation of Bone in the Human Penis”, in (Please provide the book title or journal name), page 243

2. A plant cell with thick cell walls.

   Scleroids form hard layers in roots, stems and seeds.

   2010, Ralph Kirby,T.G. Downing and M.I.El Gohary, Fundamentals of Biochemistry, Cell Biology and Biophysics

   2 more examples

   At the end of gall formation isolated scleroids are differentiated in the gall parenchyma, and much more rarely, tracheids and vessels.

   1961, Doklady: Botanical sciences sections - Volumes 136-141, page 15

   Clusters of irregularly shaped cells (scleroids) form hard shells , like those of pecans or fruit pits .

   2002, Paul W. Syltie, How Soils Work, page 13