1. A small pipe or fistular body.

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

• tabul,
• tabble,
• duble,
• huble,
• dubble,
• trubble,
• dobule,
• turble,
• stuble,
• tuile,
• tutle,
• tablle,
• touble,
• tribule,
• tibula,
• jubile,
• troubule,
• truble,
• tabale,
• tuoble

• tubful,
• tubal.

The adjective form of the word "tubule" is "tubular".

The plural of the "tubule" can be the "tubules".

The singular of the "tubule" can be the "tubule".