What is the meaning of Boll?

The rounded seed-bearing capsule of a cotton or flax plant.

A protuberance or excrescence growing on the trunks of some trees, a burl.

An old dry measure equal to six bushels.

To form a boll or seed vessel; to go to seed.

well

first/third-person singular preterite of bellen

postage stamp

brand

a ball; a more or less spherical object which is not hard or unyielding (compare kula)

a ball (pass)

a ball (testicle)

head

Source: wiktionary.org