noun
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.
彼女は健康上の理由から純粋菜食主義を実践している。
She practices pure vegetarianism for health reasons.
純粋菜食主義では、卵や乳製品も避けられる。
In pure vegetarianism, eggs and dairy products are also avoided.
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'.