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building block

 
Noun building block has 2 senses
  1. unit, building block - a single undivided natural thing occurring in the composition of something else; "units of nucleic acids"
    --1 is a kind of thing
    --1 has parts: part, piece
    --1 has particulars:
     chain, chemical chain; couple; unit cell; group, radical, chemical group; molecule
  2. building block - a block of material used in construction work
    --2 is a kind of
    building material
    --2 has particulars:
     ashlar; cinder block, clinker block, breeze block; keystone, key, headstone; voussoir
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