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ocotillo
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Oct.
oct-
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octa-
octad
octagon
octahedron
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octad

oc·tad [ ók tàd ] (plural oc·tads)


noun 
Definition:
 
group of eight: a group or series of eight

[Mid-19th century. < Greek oktad-< oktō (see octo-)]

oc·tad·ic [ ok táddik ] adjective
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