to alternate; to intermingle or vary
to swap or change places
to mutually give and receive (something); to exchange
To act as or carry out an interchange (noun, senses 2, 3).
to switch (each of two things)
A connection between two or more lines, services or modes of transport; a station at which such a connection can be made.
An act of interchanging.
A highway junction in which traffic may change from one road to another without crossing a stream of traffic.
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