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Book of Common Prayer

(Encyclopedia)Book of Common Prayer, title given to the service book used in the Church of England and in other churches of the Anglican Communion. The first complete English Book of Common Prayer was produced, mai...

Central American Common Market

(Encyclopedia)Central American Common Market (CACM), trade organization envisioned by a 1960 treaty between Guatemala, Honduras, Nicaragua, and El Salvador. The treaty established (1961) a secretariat for Central A...

parathyroid glands

(Encyclopedia)parathyroid glands pârˌəthīˈroid [key], four small endocrine bodies, located behind the thyroid gland, that govern calcium and phosphorus metabolism. These four masses of tissue (each about the s...

ligand

(Encyclopedia)ligand lĭgˈənd [key], charged or uncharged molecule with one or more unshared pairs of electrons that can attach to a central metallic atom or ion to form an aggregate known as a complex ion (see c...

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