In chemistry and mineralogy, a crystal is a solid in which the element atoms, molecules, or ions are packed in a frequently ordered, repeating pattern extending in all three spatial dimensions.

The word crystal originates from the Greek word κρύσταλλος (krystallos) meaning clear ice, as it was thoughts to be an especially solid form of water. Citation needed: The word once referred mainly to quartz, or "rock crystal".

Most metals encounter in everyday life is polycrystals. [Citation needed] Crystals are often symmetrically intergrown to form crystal twins.
Corporate bond

A corporate bond is a bond issued by a company. The term is usually applied to longer-term debt instruments, normally with a maturity date falling at least a year after their issue date. The term "commercial paper" is sometimes worn for instruments with a shorter maturity.

Sometimes, the term "corporate bonds" is used to include all bonds apart from those issued by governments in their own currency. Strictly speaking, however, it only applies to those issued by corporations.
Negotiable instrument

A negotiable instrument is not a contract per se, as contract formation requires an offer, acceptance, and consideration, none of which are basics of a negotiable instrument. Unlike ordinary contract documents, the right to the performance of a negotiable instrument is connected to the possession of the document itself (with certain exceptions such as loss or theft).

The rights of the payee (or holder in due course) are better than those provide by ordinary contracts as follows: The rights to payment are not subject to set-off, and do not rely on the power of the underlying contract giving rise to the debt (for example if a cheque was drawn for payment for goods delivered but defective, the drawer is still liable on the cheque) No notice needs to be given to any prior party legally responsible on the instrument for transfer of the rights under the instrument by negotiation Transfer free of equities—the holder in due course can hold enhanced title than the party he obtains it from Negotiation enables the transferee to become the party to the contract, and to enforce the contract in his own name. Negotiation can be effect by endorsement and delivery (order instruments), or by delivery alone (bearer instruments).
Social anthropology

Social anthropology is the branch of anthropology that studies how at this time living human beings behave in social groups.

Substantive focus and practice Practioners of social anthropology investigate, often through long term, concentrated field studies (including participant observation methods), the social organization of a particular people: customs, economic and political organization, law and conflict resolution, patterns of consumption and exchange, kinship and family structure, gender relations, childrearing and socialization, religion, and so on.

Social anthropology also explore the role of meanings, ambiguities and contradiction of social life, patterns of sociality, violence and conflict, and the underlying logics of social behavior. Social anthropologists are taught in the interpretation of narrative, ritual and symbolic behavior not merely as text, but with communication examined in relation to action, practice, and the historical context in which it is embedded. Social anthropologists address the variety of positions and perspectives to be found within any social group.