activating agent (mineral extraction) a surface-active chemical used in flotation process to increase the attraction to a specific mineral
activated carbon powdered or granular carbon used for purifying by adsorption
activation energy the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur
activating the activity of causing to have energy and be active
activated charcoal powdered or granular carbon used for purifying by adsorption
active agent chemical agent capable of activity
actinide series (chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium
Vitus Bering Danish explorer who explored the northern Pacific Ocean for the Russians and discovered the Bering Strait (1681-1741)
Vitus Behring Danish explorer who explored the northern Pacific Ocean for the Russians and discovered the Bering Strait (1681-1741)
Achmad Sukarno Indonesian statesman who obtained the independence of Indonesia from the Netherlands in 1949 and served as president until ousted by Suharto in a coup d'etat (1901-1970)
active citizen a citizen who takes an active role in the community
active trust a trust in which the trustee must perform certain duties
activistic advocating or engaged in activism
protective covering a covering that is intend to protect from damage or injury
commodities exchange an exchange for buying and selling commodities for future delivery
get off the ground get started or set in motion, used figuratively
active transport transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
teething ring device used for an infant to suck or bite on
acute triangle a triangle whose interior angles are all acute
activator any agency bringing about activation