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单词
cardioid
释义
WordReference Random House Unabridged Dictionary of American English © 2024
car•di•oid
(kär
′
dē oid′),
USA pronunciation
n.
[
Math.
]
Mathematics
a somewhat heart-shaped curve, being the path of a point on a circle that rolls externally, without slipping, on another equal circle. Equation:
r = a
(1-cosA).
Greek
kardioeidé̄s
heart-shaped. See
cardi
-, -
oid
1745–55
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更新时间:2026/3/23 4:14:31