Buried Red cement is a buried electrical cable
The prefix "chloro-" indicates the presence of chlorine in a compound or molecule.
One official definition for the word sign is "an object, quality, or event whose presence or occurrence indicates the probable presence or occurrence of something else."
If starch turns blue-black, it indicates the presence of iodine. Iodine binds to the starch molecules, causing this color change. This reaction is often used as a test for the presence of starch in biological samples.
The prefix "poly-" in polycystic means multiple or many. In the case of polycystic, it indicates the presence of multiple cysts.
concrete and cement
It is not rain forced but re-inforced cement concrete. It means the concrete after setting and hardening.
Sand / cement ratio = 3 , that means: 1 part of cement to 3 parts of sand by volume , with sufficient water to get workable mixture.
A safety symbol indicates the presence of information or instructions about health or safety at work by means of a signboard, a colour, an illuminated sign or acoustic signal, a hand signal or a verbal communication.'
The suffix "-ous" in the word "joyous" indicates the presence of joy or happiness. Therefore, "joyous" means filled with joy or happiness, exuding a sense of delight or celebration.
Vac = empty indicates why vacation means time off work.
"Cement" can function as both a noun and a verb. As a noun, it refers to a substance used for building and construction. As a verb, it means to join or bind together firmly.
A wavy blue line on a map usually represents a river or a water body. It indicates the presence of water in that area.