paleosol
(embryology) A formation that occurs during the initial phases of embryonic development in birds, reptiles and mammals.
In a narrowish manner.
(soil science) A layer of fossil soil buried beneath other sediments or deposits.
(pathology) A benign hepatic adenoma.
地質学者たちは火山灰層の下に古土壌を確認し、噴火の前に長期間の土壌形成があったことを示した。
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