ramentum, n.
Pronunciation: Brit. /rəˈmɛntəm/, U.S. /rəˈmɛn(t)əm/
Inflections: Plural ramenta.
Etymology: < classical Latin rāmentum fragment scraped off, shaving < rādere to scrape (see raze v.) + -mentum -ment suffix.
†1. A fragment scraped off, a shaving. Formerly also: a tiny particle, an atom. Chiefly in pl. Obs.
1658 J. Ray Jrnl. 20 Aug. in Remains (1846) 124 Common or rain water falling upon a stone doth continually carry away some insensible ramenta or atoms of it.
1678 R. Cudworth tr. Aristotle in True Intellect. Syst. Universe i. iii. 115 Those Ramenta that appear in the Air when the Sun-beams are transmitted through Cranies.
1700 Philos. Trans. (Royal Soc.) 22 897 Her urine during the paroxysm tinged with blood, and in it bloody ramenta.
1740 G. Cheyne Ess. Regimen 5 Earth..being probably the Ramenta or abrasions of the other elements.
1776 tr. G. van Swieten Comm. Boerhaave's Aphorisms (new ed.) VI. 314 These are the..ramenta, or shavings, as they are called by Hippocrates.
1834 S. Cooper Good's Study Med. (ed. 4) I. 73 Sir Gilbert Blane.considers the salivary glands as one of the outlets for the ramenta of the bones.
1845 A. Clissold tr. E. Swedenborg Principia I. ii. ix. 334 Obtain the iron: which like the ramenta of all iron will approximate and elevate itself toward the magnet.
2. Bot. A thin, brownish, membranous epidermal appendage on a stem or leaf, esp. of a fern; a scale.
1793 T. Martyn Lang. Bot. sig. Q2, Ramentum,..applied by Linneus to the small loose scales that are frequently found on the stems of vegetables.
1809 J. E. Smith Introd. Physiol. & Systematical Bot. (ed. 2) 227 Some Begoniæ bear on their leaves flat little straps called by authors ramenta, shavings, instead of cylindrical hairs.
1832 J. Lindley Introd. Bot. 41 Ramenta..are particularly numerous..upon the petioles and the backs of the leaves of Ferns.
1872 H. A. Nicholson Man. Palæontol. 480 Rhizomata..covered with hairs or ramenta.
1909 G. Klebs in A. C. Seward Darwin & Mod. Sci. 209 The scaly hairs, or ramenta, which clothe every part of the plant, are also like those of Ferns.
1919 Sci. Monthly July 25 The area between the leaf-scars is covered with two kinds of structures: the ramentum and the roots. The former, characteristic of most ferns, consists of brown chaff-like scales.
1943 Bot. Gaz. 105 208/1 Primordia of all leaves originate as small moundlike outgrowths among occasional young ramenta on the conical stem tip.
2002 Plant Physiol. & Biochem. 40 90/1 Apparent phenotypic differences, leaf color, size, lateral lines..and stem ramenta were recognizable.
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