Noun ground substance has 2 senses
  1. matrix, intercellular substance, ground substance - the body substance in which tissue cells are embedded
    --1 is a kind of body substance
    --1 is a part of bone, os; cartilage, gristle; connective tissue
  2. hyaloplasm, ground substance - the clear nongranular portion of the cytoplasm of a cell
    --2 is a kind of cytoplasm
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