What is pecs means?

I am not sure of what your question really is. Some possible answers are:

• PEC-12 is a trademark for a waterless cleaning mixture, it has no direct application to food and is toxic.
• PEG is polyethylene glycol a slightly sweet tasting organic solvent used in some food and personal hygiene products, it is nontoxic.
• Piedmont Environmental Council (PEC) is an organization founded in 1972 to promote and protect the Virginia Piedmont's rural farming economy, Natural Resources, history and beauty.
• Xni Pec is a name from the Mayan language (where it means dog's nose) for a type of salsa.
• Prince Edward County (PEC) is a county in Ontario Canada.
• etc.