1. The marrow in the cavities of the bones; the pith of plants.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• medicla,
• modula,
• medulia,
• medula,
• medua,
• betulla,
• medulls,
• meddulla,
• meduilla,
• medull,
• medullaa,
• madulla,
• metulla,
• medullar,
• mobulla,
• tessulla,
• venulla,
• venulaa,
• fecullae,
• meddullar

• medel,
• metal,
• meddle,
• medal.

The adjective form of the word "medulla" is "medullary".