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Alternative spelling of 五十路 (isoji): fifty, 50
He turned fifty.
eunicids, bloodworms, any of various marine worms in the Eunicidae family
Eunicids, or 'Isome', are string-like polychaetes living on the sea floor.
seashore
I picked up shells on the seashore.
(linguistics) lexeme
He struggled to understand the meaning of that lexeme.
Cold War
The US-Soviet Cold War was a significant turning point in world history.
dependency
He is completely dependent on coffee.
cornerstone laying ceremony
We attended the cornerstone laying ceremony of the new building.
(dated) calcium, Ca
Old scientists discovered that calcium was important for bone health.
オレフィン系炭化水素: (organic chemistry) alkene
Alkenes, also known as olefin hydrocarbons, play an important role in organic chemistry.
アセチレン系炭化水素: (organic chemistry) alkyne
Alkynes play a very important role in organic chemistry.
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