脊灰

Traditional form:

脊灰

Pinyin (reading):

jǐhuī

Definitions:

• polio (abbr. for 脊髓灰質炎／脊髓灰质炎 (jisuǐhuizhiyān))

Characters:

• 脊 - spine, backbone; ridge
• 灰 - ashes; dust; lime, mortar

Traditional characters:

• 脊 - spine, backbone; ridge
• 灰 - ashes; dust; lime, mortar