the caput of sth
caput 是源自拉丁语的专业术语，多用于解剖学或生物学描述，日常英语很少使用。
The caput of the long bone is smooth and rounded.
这块长骨的头部光滑而圆润。
头；头部
顶部；上端；球状突起；小头；球状突起或小头；物体的顶部或上部
头部
The head.
球状突起或小头
A knob-like protuberance or capitulum.
物体的顶部或上部
The top or superior part of a thing.
The caput of the femur is the rounded head that fits into the hip socket.
股骨头是嵌入髋臼的圆形头部。
用法提示：caput 是名词，作主语，指股骨上端的球形头部。
The surgeon carefully examined the caput of the humerus on the X-ray.
外科医生在X光片上仔细检查了肱骨头。
用法提示：caput 是名词，作 examined 的宾语，指肱骨末端的头部。
In many vertebrates, the caputs of the ribs attach to the spine.
在许多脊椎动物中，肋骨小头附着在脊柱上。
用法提示：caputs 是 caput 的复数形式，作主语，指肋骨的头部小突。
caput 是源自拉丁语的专业术语，多用于解剖学或生物学描述，日常英语很少使用。
The caput of the long bone is smooth and rounded.
这块长骨的头部光滑而圆润。
指球状突起或小头时，常用 a caput on ... 说明其所在位置。
A small caput on the stalk marks where the leaf was attached.
茎上的一个小头状突起标出了叶子原来的着生位置。
表示“顶部、上端”时属书面或专业用法，相当于一般说法 the top of。
The inscription was carved at the caput of the column.
铭文刻在柱子的顶部。
cap 是日常可数名词，常指帽子、瓶盖/笔帽或某物的顶部；caput 是拉丁语源的书面/解剖术语，泛指“头”或“顶部”，不用于日常的帽子或盖子。
capital 的常用义是首都、资本或大写字母，通常不表示“头”；与 caput 主要只是拼写相近，不能替代 caput 的“头/顶部”义。
occiput 专指后脑勺/枕部，是解剖学术语；caput 泛指头或顶部，不限定具体部位。两者拼写相近但所指范围不同。
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