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trisaccharide
trisect
trishaw
triskaidekaphobia
triskelion
trismus
trisoctahedron
trisodium
trisomy
Tristan and Iseult
Tristan da Cunha
tristate
tristearin
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tristful
tristich
tristimulus values
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trisomy
tri·so·my [ tr smee, trī sṓmee ]


noun 
Definition:
 
condition of having 3 chromosomes: the genetic condition of having one or more sets of three chromosomes instead of the usual pairs

tri·so·mic [ trī sómmik ] adjective
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