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spiroid from New Latin spiroïdes, from Greek speiroeidēs, from speira coil, twist + -oeidēs -oid; spiroidal International Scientific Vocabulary spiroid + -al
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“Spiroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spiroid. Accessed 29 Jun. 2022.
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