Hydrula is a term used to describe a genus of freshwater snails found in Europe and North America. The spelling of hydrula is consistent with standard English phonetic rules and is pronounced as /hʌɪˈdruːlə/. The IPA phonetic transcription of the word highlights the vowel sounds in the first and last syllables, along with the consonant sounds in the intervening letters. The spelling of hydrula is useful in distinguishing this genus from closely related taxa and in depicting accurate taxonomic classifications in scientific literature.