好词典

deciduous

UK //dɪˈsɪdʒ.u.əs//US //dɪˈsɪdʒ.u.əs//

词源

源自拉丁语 'deciduus'(意为“倾向于掉落的”),由 'de-'(向下)和 'cadere'(掉落)组成,17世纪进入英语。

adjective

❶ 形容树木或植物在特定季节(通常是秋季)会落叶的,与常绿植物相对。这类植物会定期脱落叶子以适应气候变化。

“Maple trees are deciduous and lose their leaves in autumn.”

(枫树是落叶树,秋天时会落叶。)

“The deciduous forest changes color dramatically in the fall.”

(落叶林在秋天时颜色会发生显著变化。)

❶ 形容某些动物结构(如鹿角)会周期性脱落的,与永久性结构相对。常用于描述哺乳动物的角或牙齿。

“Deer have deciduous antlers that shed annually.”

(鹿有每年脱落的周期性鹿角。)

“The deciduous teeth of children are replaced by permanent ones.”

(儿童的乳牙会被恒牙替代。)

同义词:shedding, temporary, non-permanent

常见短语

deciduous forest — 指由落叶树种组成的森林,其树木会随季节变化而落叶,常见于温带地区。

“The deciduous forest in New England is famous for its fall foliage.”

(新英格兰的落叶林以其秋季红叶闻名。)

deciduous teeth — 人类和多数哺乳动物幼年时期的第一套牙齿,会在成长过程中被恒牙替换。

“Children usually start losing their deciduous teeth around age 6.”

(儿童通常在6岁左右开始脱落乳牙。)