| 单词 | ptygma |
| 释义 | Definition of ptygma in English:ptygmanoun ˈtɪɡmə Geology
Origin1940s; earliest use found in Transactions of the Royal Society of Edinburgh. From ancient Greek πτύγμα fold, anything folded (from the stem of πτύσσειν to fold + -μα), after ptygmatic. Definition of ptygma in US English:ptygmanounˈtɪɡmə Geology
Origin1940s; earliest use found in Transactions of the Royal Society of Edinburgh. From ancient Greek πτύγμα fold, anything folded (from the stem of πτύσσειν to fold + -μα), after ptygmatic. |
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