To turn or fold inwardly.
To fold inward to create a hollow space where none had existed, as with a gastrula forming from a blastula.
To fold up or enclose into a sheath-like or pouch-like structure, either naturally or as part of a surgical procedure.
Having one portion of a hollow organ drawn back within another portion.
sheathed
To cause to move backward and forward in seesaw fashion.
To use a seesaw.
To fluctuate.
An abnormal breathing pattern caused by airway obstruction, characterized by paradoxical chest and abdominal movement.
A structure composed of a plank, balanced in the middle, used as a game in which one person goes up as the other goes down.
A series of up-and-down movements.
A series of alternating movements or feelings.
fluctuating.