pussy willow
noun
1- a willow with soft fluffy yellow or silvery catkins that appear before the leaves褪色柳。参见SALLOW2 （义项1）。
1.1
- Genus Salix, family Salicaceae: several species, in particular (in the US) the glaucous willow (S. discolor), and (in Britain) the goat willow (S. caprea) and grey willow (S. cinerea).柳属, 杨柳科：数种, 尤指（美国）褪色柳和（英国）黄花柳与灰柳。
词源
mid 19th cent.: originally a child's word, because of the resemblance of the soft fluffy catkins to a cat's fur.