Jisho

×
つ
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Conjunction
1. indicates two contrasting actions​See also 浮きつ沈みつ, See also 追いつ追われつ, form: ...つ...つ
Particle
2. indicates possessive (often found in place names and compound words)​Archaic
Wikipedia definition
3. Tsu (kana)​つ, in . The sokuon, which are used mainly to indicate consonant gemination, are identical but somewhat smaller. The dakuten forms づ, ヅ, pronounced the same as the dakuten forms of the su kana in most dialects, are uncommon. They are primarily used for indicating a voiced consonant in the middle of a compound word, and they can never begin a word.
Read “Tsu (kana)” on English Wikipedia
Read “つ” on Japanese Wikipedia
Read “Tsu (kana)” on DBpedia

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