ガストロノーム

ガ

ス

ト

ロ

ノ

ー

ム

Meanings

1

A person who appreciates and is knowledgeable about fine food and drink; a connoisseur of haute cuisine.

し

て

、

世せ

界かい

中じゅう

の

高こう

級きゅう

レストラン

を

巡めぐ

っ

て

いる

。

As a gastronome, he travels around the world visiting high-end restaurants.

グルメ
グルメ is a more common, everyday term for a food lover or gourmet, while ガストロノーム is a rarer, more formal or literary term emphasizing deep culinary knowledge.
食しょく通つう
食通 is a native Japanese term for a gourmet or epicure, often used in casual contexts, whereas ガストロノーム carries a European, sophisticated nuance.

Borrowed from French 'gastronome', ultimately from Greek 'gastronomos' (stomach + law/rule).