from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A block used as a building material, especially a cinder block.
- n. A small wooden or plastic cube used as a building toy.
- n. A basic element or part of something: Amino acids are the building blocks of proteins.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A component that is part of a larger construction.
- n. A block made of wood or plastic that is used as a children's toy.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a block of material used in construction work
- n. a single undivided natural thing occurring in the composition of something else
Sorry, no etymologies found.
Dioxin, along with pesticides, insecticides, and plasticizers such as bisphenol A, or BPA, a plastics building block used in everything from safety helmets, dental sealants, and eyeglass lenses to everyday food packaging, are what are also known as endocrine disruptors, a group of environmental contaminants that can affect our immune system and our resistance to disease in another particularly insidious way—and in particularly small doses—by disrupting our bodies’ natural hormonal signals.