| 释义 |
pulvinule Bot.|ˈpʌlvɪnjuːl|
[ad. L. pulvīnul-us, dim. of pulvīn-us cushion, pillow, bank. (Also used in L. form.)]
1. One of a number of excrescences, sometimes like minute trees, rising from the thallus of lichens.
1858Mayne Expos. Lex., Pulvinula..term by Acharius for filaments,..often imitating small bushes or cushions, which are raised from the superior surface of the thallus of certain lichens, as the Parmelia glomulifera: a pulvinule.
2. A heap of naked spores.
1874Cooke Fungi (1875) 39 There is great variability in the compactness of the spores in the sori, or pulvinules. Ibid. 144 The winter spores are in solid pulvinules.
3. = pulvinus.
1928E. Hughes-Gibb Life-force in Plant World vii. 153 Upon scratching or irritating the pulvinule of the terminal leaflet of either of these beans on its under-side, a downward movement very slowly begins. 1975Nature 6 Mar. 69/2 We provide direct experimental evidence for cyclic changes in membrane properties in a circadian system from studies of the pulvinule cells at the base of the leaflets of clover. |