| 单词 | juvenile hormone |
| 释义 | > as lemmasjuvenile hormone juvenile hormone n. Entomology the hormone that controls the development of larval characteristics in insects. ΘΚΠ the world > animals > invertebrates > phylum Arthropoda > class Insecta > eggs or young > [noun] > young or development of young > larva > parts of > hormone controlling development juvenile hormone1940 neotenin1954 1940 V. B. Wigglesworth in Jrnl. Exper. Biol. XVII. 221 In previous papers the ‘inhibitory hormone’ was so called because in its presence the production of imaginal characters at moulting is suppressed. But in view of its probable mode of action through the activation of the nymphal system at the expense of the imaginal, it might be preferable to refer to this hormone as the ‘nymphal’ or ‘juvenile’ hormone. 1965 J. Lee & F. Knowles Animal Hormones xiii. 161 Normal development depends on changes in the relative amounts of ecdysone and the juvenile hormone which are available to the tissues. 1967 New Scientist 20 Apr. 154/1 Juvenile hormone..is necessary for the normal growth of immature insects—caterpillars and grubs, for example. 1970 Daily Tel. 16 Nov. 6/1 Many South American plants contain similar substances to insect juvenile hormone. < as lemmas |
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