stringers
The space under a staircase is called a spandrel.
A Dutch boxed staircase is a staircase that has enclosed sides, creating a box-like structure around the stairs. This design is common in Dutch architecture and provides a classic and elegant look to the staircase.
The staircase shape of DNA is often referred to as a "double helix." This structure consists of two intertwined strands that form the sides of the staircase, with pairs of nitrogenous bases acting as the steps. The arrangement of these bases encodes genetic information, while the helical shape provides stability and allows for efficient packing within cells.
Handrails or bannisters
A double helix, like the sides of a spiral staircase.
When xylem is surrounded by phloem from outer as well as inner sides, the vascular bundles are called amphivasal
Bed room
The staircase along the periodic table is called the "staircase of metalloids" or "zigzag line." It separates the metals on the left from the nonmetals on the right and helps to distinguish between the properties of elements in different regions of the table.
You could be like the side elevation of a staircase.
The two outer sides
The decorative wood on a staircase is called "wainscot"
It is usually called a landing.