cirrus cloud(s)
cirrus 常直接放在 cloud 前作定语，指高空的卷云。
Thin cirrus clouds stretched across the morning sky.
缕缕卷云横过清晨的天空。
卷云
触毛；触须；卷须；卷须:植物攀援用的细长卷曲茎。；一种细长的卷须状附肢,如某些鱼类的触须、某些原生生物的纤毛或某些蔓足类的足。；一种主要的高层云,通常由纤细而柔弱的白色丝缕或细带组成。
A principal high-level cloud type, composed of thin, delicate white filaments or narrow bands.
卷须:植物攀援用的细长卷曲茎。
Synonym of tendril (“a thin, spirally coiling stem that attaches a plant to its support”).
一种细长的卷须状附肢,如某些鱼类的触须、某些原生生物的纤毛或某些蔓足类的足。
A thin tendril-like appendage, such as a barbel (“whisker-like sensory organ around the mouth”) of some fish, a cilium of some species of protists, or a foot of some crustaceans of the infraclass Cirripedia.
一种主要的高层云,通常由纤细而柔弱的白色丝缕或细带组成。
A principal high-level type of cloud, typically composed of thin, delicate, white filaments or wisps, or narrow bands.
The sky was filled with wispy cirrus clouds high above.
高空中布满了纤细的卷云。
用法提示：此处 cirrus 作名词，与 clouds 一起表示‘卷云’的气象概念。
At high altitudes, cirrus often indicates an approaching warm front.
在高空，卷云通常预示着暖锋的临近。
用法提示：cirrus 作为不可数名词，指代一种特定的云型。
The pilot noticed a band of cirrus ahead and adjusted the flight path.
飞行员注意到前方有一片卷云，于是调整了航线。
用法提示：cirrus 前用 a band of 量化，表达‘一片卷云’的常用搭配。
cirrus 常直接放在 cloud 前作定语，指高空的卷云。
Thin cirrus clouds stretched across the morning sky.
缕缕卷云横过清晨的天空。
此义指植物的卷须，通常用复数形式 cirri。
The climbing plant clings to the wall with its cirri.
这种攀援植物用卷须攀附在墙上。
此义指鱼类等动物口边的触须状附肢。
The catfish's head is covered with small sensory cirri.
鲶鱼的头部覆盖着细小的感觉触须。
grammar · medium
易错句子The sky was full of thin, wispy cirruses.
正确表达The sky was full of thin, wispy cirri.
cirrus 借自拉丁语，复数是不规则的 cirri，不能按英语常规加 -es 变成 cirruses。汉语名词本身没有单复数变化，学习者容易把 -s/-es 当成万能复数后缀套用。
grammar · medium
易错句子The sky was dotted with puffy white cirrus clouds.
正确表达The sky was dotted with puffy white cumulus clouds.
cirrus 只指高空中纤细、丝缕状的卷云（不呈团块状）；蓬松成团的云要用 cumulus（积云）。汉语常用一个“云”字涵盖各种云，学习者容易把 cirrus 当成“云”的通用说法，忽略它特有的形态限制。
拼写和读音只差一点，但 citrus 指柑橘类水果或果树，cirrus 指卷云、卷须或触毛，意思毫无关系。
同属云名，但 cumulus 是低空蓬松成团的积云，cirrus 是高空中纤细如丝缕的卷云，按外形和高度区分。
同为云名，stratus 是低而均匀铺展成层的层云，cirrus 是高空纤细成丝的卷云，依云的高度和形态选用。
n. (cirro- + cumulus)
n. (cirro- + stratus)
adj. (cirri- + -form)
adj. (cirr- + -ose)
n. (cirr- + -ped)
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