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The word coquinarium could not be parsed. Trying a normal dictionary lookup:
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cŏquīnārĭus, a, um, adj. [coquina], of or pertaining to the kitchen, culinary (rare): vasa, Plin. 33, 11, 49, § 140.
As the title of a work of Apicius, De arte coquinaria.
Access. form cŏquīnāris, e, adj.: culter, a kitchen-knife, Varr. ap. Non. p. 195, 17.