noun
bulbous vegetable
Botanical term for vegetables that form bulbs, such as onions, garlic, and tulips (when considered as food).
鱗茎菜にはタマネギやニンニクが含まれる。
Bulbous vegetables include onions and garlic.
球根 is a broader term for any plant bulb (including ornamental), while 鱗茎菜 specifically refers to edible bulbous vegetables.
Compound of 鱗茎 (bulb) and 菜 (vegetable). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning.