clump

Concise Oxford English Dictionary © 2008 Oxford University Press:
clump/klʌmp/

▶noun

• 1 a small group of trees or plants growing closely together.

  ■ a compacted mass or lump.

  ■ Physiology an agglutinated mass of blood cells or bacteria, especially as an indicator of the presence of an antibody to them.

• 2 another term for clomp.

▶verb

• 1 form into a clump or mass.

• 2 another term for clomp.

– origin ME: partly imitative; rel. to club2.