A person who is knowledgeable about food, cooking, and the art of eating; a gourmet or expert in gastronomy.
From Greek 'gastro-' (stomach) + 'soph' (wisdom or wise person). This is a humorous or archaic term for someone wise in matters of food and eating.
The word 'philosopher' has the exact same structure—'philo-' (love) + 'soph' (wisdom)—so a gastrosoph is literally someone with 'stomach wisdom' or wisdom about food!
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