
Boll
Plant Case
Boll refers to the protective spherical case around seeds of certain plants.

Look at how the bolls protect the seeds inside.
Agricultural Term
Most commonly used in agriculture; especially when discussing cotton or flax.

During harvest, farmers check if the bolls have opened.
Mature Boll
A 'mature boll' indicates that the fruit case has ripened and seeds are ready.

The field is full of mature cotton bolls.
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