What does 中性 mean?
中性 is a Japanese noun meaning “neuter gender, neutral” in English. It can also be translated as “sexlessness, neuter gender” depending on context. It is written as 中性 in kanji, ちゅうせい in hiragana, and chuusei in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
リトマス紙で溶液の液性（酸性、中性、塩基性）を調べるときは、リトマス紙をすべて溶液に浸すのではなく、紙の先端の部分だけを浸します。
When investigating the pH (acidic, neutral, alkaline) of a liquid, don't soak the litmus paper completely in the liquid but just put the end of the paper in it.