名詞 pendulum:

1. an apparatus consisting of an object mounted so that it swings freely under the influence of gravity

1. A pendulum oscillates.
   擺錘能擺動。
2. The pendulum of the clock in my room is a bear.
   我房間的鐘擺是小熊形狀的。

pen.du.lum

n.（名詞）
A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices, especially clocks.Also called simple pendulum
擺：在一固定點懸垂的可在重力影響下自由來回擺動的擺體，通常用于調(diào)校鐘等各種儀器也作 simple pendulum
Something that swings back and forth from one course, opinion, or condition to another:
沿某一路線、想法或事態(tài)來回擺動的東西：
例句：
the pendulum of public opinion.
民意變化不定

來源：
New Latin
現(xiàn)代拉丁語
probably from Italian pendolo [pendulous, pendulum]
可能源自 意大利語 pendolo [松垂的，鐘擺]
from Latin pendulus [hanging] * see pendulous
源自 拉丁語 pendulus [垂懸的] *參見 pendulous