pallial sinus
noun
1
: an often conspicuous inward bend in the posterior part of the pallial line of a bivalve mollusk
2
: any of the branching channels through which fluids circulate in the mantle of a brachiopod
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“Pallial sinus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pallial%20sinus. Accessed 23 Nov. 2024.
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