Definition of ptygma in English:

ptygma

noun ˈtɪɡmə

Geology

A ptygmatic fold.

Origin

1940s; 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:

ptygma

nounˈtɪɡmə

Geology

A ptygmatic fold.

Origin

1940s; 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.

词汇	ptygma
释义	Definition of ptygma in English: ptygma noun ˈtɪɡmə Geology A ptygmatic fold. Origin 1940s; 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: ptygma nounˈtɪɡmə Geology A ptygmatic fold. Origin 1940s; 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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