an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system | a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and in various alloys; found in arsenopyrite and orpiment and realgar |
an abstract part of something | a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer |
the most favorable environment for a plant or animal | |
a straight line that generates a cylinder or cone | |
the situation in which you are happiest and most effective | |
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter | |
one of four substances thought in ancient and medieval cosmology to constitute the physical universe | |