A molecule: the smallest unit of a chemical compound made of two or more atoms bonded together; it determines the properties of a substance.
水は酸素と水素の原子が結合してできた分子だ。
Water is a molecule made of oxygen and hydrogen atoms bonded together.
この反応では大きな有機分子が生成する。
A large organic molecule is produced in this reaction.
分子の構造を調べるためにスペクトル解析を行った。
We performed spectral analysis to examine the molecular structure.
The numerator of a fraction — the number written above the line that indicates how many parts are being considered.
分数3/4の分子は3、分母は4だ。
In the fraction 3/4, the numerator is 3 and the denominator is 4.
通分するときは分子と分母を同じ数で掛ける。
When finding a common denominator, multiply the numerator and denominator by the same number.
An element or member of a group — a person or factor that belongs to or represents part of a group (e.g. 'radical element').
警察は暴力的な分子を取り締まった。
The police cracked down on violent elements.
その政党には改革を望む分子が多い。
There are many members within the party who want reform.
過激な分子を排除する必要がある。
It is necessary to remove/extinguish radical elements.
A small particle or microparticle (usage related to terms like 'microparticle').
空気中の微小な分子が測定装置で検出された。
Tiny particles in the air were detected by the measuring device.
このフィルターは微粒子や分子レベルの汚れを除去する。
This filter removes dirt at the particle and molecular level.