Spirillaceae
noun plural
Spi·ril·la·ce·ae
ˌspī-rə-ˈlā-sē-ˌē 
: a family of phylogenetically heterogeneous gram-negative bacteria including the single genus Spirillum and comprising rigid more or less spirally curved elongate forms
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“Spirillaceae.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Spirillaceae. Accessed 9 Nov. 2025.
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