mactra
A triarylmethane dye, the structural core of a variety of other dyes.
(automotive, engineering) A reference to the Otto cycle and four-stroke internal combustion engines.
(pathology) A disease of muscle characterised by infiltration of macrophages
Any marine bivalve shell of the numerous known species of genus Mactra and allied genera, some of which are used as food, as Mactra stultorum, of Europe.
干潮時に生物学者はその小さなトラフ貝を慎重に開いて殻の模様を調べた。
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