Word:

Secondary rocks

(Geol.) those lying between the Primary, or Paleozoic, and Tertiary (see Primary rocks, under Primary); - later restricted to strata of the Mesozoic age, and at present but little used.

See also: Secondary

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secondary damage
secondary dentition
secondary diabetes
secondary diagonal
secondary dysmenorrhea
secondary education
secondary emission
Secondary evidence
Secondary fever
Secondary hemorrhage
secondary hypertension
secondary key
secondary modern school
Secondary planet
Secondary qualities
Secondary quills
-- Secondary rocks --
Secondary roots
secondary school
secondary sex character
secondary sex characteristic
secondary storage
secondary syphilis
Secondary tint
Secondary union
Secondary use
secondary winding
Seconder
Secondhand
Secondly
secondment
Secondo
Seconds
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