gird·er 
(gûrdər)
(gûrdər)n.
A beam, as of steel, wood, or reinforced concrete, used as a main horizontal support in a building or bridge.
- biogenetic law
- biogenic
- biogenic amine
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- biogeny
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- bioherm
- bioidentical
- bioinformatics
- bioinorganic
- bioinstrumentation