WordNet (3.0) WordNet (3.0)
(n) a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found, Syn. guide fossil
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ทราบความหมายของคำศัพท์นี้? กด [เพิ่มคำศัพท์] เพื่อใส่คำนี้พร้อมความหมาย เพื่อเป็นวิทยาทานแก่ผู้ใช้ท่านอื่น ๆ
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