| 单词 | atactic |
| 释义 | atactic, a.|əˈtæktɪk|
[f. Gr. ἄτακτος not arranged (f. ἀ priv. + τακτός, vbl. adj. f. τάσσ-ειν to arrange) + -ic.]
1. Of language: not syntactic.
1842Chamb. Jrnl. 30 July 218 In this manner syntactic and atactic forms have been respectively formed.
2. Path. Of or pertaining to or afflicted with ataxia.
1880W. James Feeling of Effort 20 in Anniv. Mem. Boston Soc. Nat. Hist., The special case of the limb being completely anæsthetic, as well as atactic. 1956Jakobson & Halle Fundamentals of Lang. ii. iv. 74 In one variety of aphasia..sometimes..labeled ‘atactic’, the word is the sole linguistic unity preserved... All other sound-sequences are either alien and inscrutable to him or he merges them into familiar words by disregarding their phonetic aberrations.
3. Characterized by or exhibiting irregularity in the spatial arrangement of parts in a molecule. Cf. isotactic a., syndyotactic a.
1957Chem. Abstr. 15993 [Abstract of art. by G. Natta et al. in 1957 Gazz. Chim. Ital. LXXXVII]. Stereospecific polymerization... First syntheses of isotactic and atactic polypropene. 1957Technology July 176/2 The side groups are situated quite at random along the chain; this type of combination is termed ‘atactic’..atactic polypropylene is a rubbery material freezing below -30 deg. C. |
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