| 释义 |
procumbent, a.|prəʊˈkʌmbənt|
[ad. L. prōcumbent-em, pr. pple. of prōcumb-ĕre to fall forwards, bend down, f. prō, pro-1 1 b + *cumb-ĕre to lay oneself: see cumbent.]
1. Lying on the face, prone; prostrate.
1721Bailey, Procumbent, lying along. 1755Johnson, Procumbent, lying down, prone. 1791Cowper Odyss. ix. 580 Procumbent, each obey'd. 1822–34Good's Study Med. (ed. 4) II. 449 It [bleeding] will cease upon bending the head forward, or lying procumbent. 1884Bower & Scott De Bary's Phaner. 486 Medullary rays with procumbent cells are..easy to distinguish from parenchyma of the bundles.
2. Bot. Of a plant or stem: Lying flat on the ground without throwing out roots; growing along the ground; having a prostrate or trailing stem.
1668Wilkins Real Char. ii. iv. §4. 82 Week procumbent stalks, full of joynts. 1756Phil. Trans. XLIX. 835 The common Tormentil is..very frequently found in a procumbent state. 1851T. Moore Brit. Ferns 195 Lycopodium selaginoides..has a slender, procumbent, often branched stem.
3. Zool. Of a tooth: lying along the jaw.
1874T. C. Jerdon Mammals of India 62 Upper middle incisors distant; lower ones procumbent. 1902Encycl. Brit. XXX. 506/1 In the lower jaw there is a single pair of procumbent incisors, followed by several small teeth representing the canine and early premolars. 1977Roonwal & Mohnot Primates S. Asia 41 It holds small fruit in both hands while chewing, and larger food, such as an unpeeled banana, is chipped with its procumbent lower incisors. 1978Nature 17 Aug. 663/1 Diplodocids had elongated tapering snouts with delicate, procumbent teeth for selecting smaller plant parts. |