Definition of 「芉」:
1. Job's Tears seed.
2. An ancient character meaning "stalk" or "stem".
从旱,旱亦声。“旱”指用盾牌抵挡毒辣阳光以保护庄稼。秆,禾茎也。――《说文》
From “drought,” which also serves as a phonetic component. “Drought” refers to the use of a shield to block the scorching sun to protect crops. The term also means “stalk” or “grain stem.” — Xuanwen
稻麦等植物的茎:麦芉儿。麻芉儿。高粱芉儿。烟芉。苇~。
The stems of plants such as rice and wheat: wheat stem (麦芉儿), hemp stem (麻芉儿), sorghum stem (高粱芉儿), tobacco stem (烟芉), reed stem (苇~).