凹殼子 [－壳－]

Jyutping nap1 hok3 zi2
Pinyin āo ké zǐ

Definitions (Wiktionary)
  1. noun, Xiang
    blighted grain
    (syn.) 凹秕子, 冇粒, 凹谷子, 凹穀子, 秕子