pure vegetarianism; veganism
A formal or technical term for a diet that excludes all animal products. In everyday conversation, ビーガン or 完全菜食主義 is more common.
She practices pure vegetarianism for health reasons.
In pure vegetarianism, eggs and dairy products are also avoided.
More common synonym for veganism; 純粋菜食主義 is a less frequent variant with a slightly more formal or purist nuance.
Vegetarianism, which may include dairy and eggs, unlike 純粋菜食主義.
Compound of 純粋 (pure) + 菜食 (vegetable diet) + 主義 (principle/doctrine). The term is a direct calque or translation of 'pure vegetarianism' or 'veganism'.