closed string

close string, close stringer, closed stringer, curb string, housed string

A staircase string whose upper edge is straight and parallel to its lower edge; the tread and riser ends are housed in the face of the string and are concealed.
References in periodicals archive ?
I learned about open string and closed string theories.
Closed string oscillations are sometimes called left movers and right movers.
The vibrational patterns are symmetrical regardless of whether they travel left or right along the closed string.
The simplest vibration of a closed string produces a graviton, the quantized particle of gravity.