|1.||the act or state of cohering; tendency to unite|
|2.||physics the force that holds together the atoms or molecules in a solid or liquid, as distinguished from adhesion|
|3.||botany the fusion in some plants of flower parts, such as petals, that are usually separate|
|[C17: from Latin cohaesus stuck together, past participle of cohaerēre to |
cohesion co·he·sion (kō-hē'zhən)
The intermolecular attraction that holds molecules and masses together.
|cohesion (kō-hē'zhən) Pronunciation Key
The force of attraction that holds molecules of a given substance together. It is strongest in solids, less strong in liquids, and least strong in gases. Cohesion of molecules causes drops to form in liquids (as when liquid mercury is poured on a piece of glass), and causes condensing water vapor to form the droplets that make clouds. Compare adhesion.
in physics, the intermolecular attractive force acting between two adjacent portions of a substance, particularly of a solid or liquid. It is this force that holds a piece of matter together. Intermolecular forces act also between two dissimilar substances in contact, a phenomenon called adhesion. These forces originate principally because of coulomb (electrical) forces. When two molecules are close together, they are repelled; when farther apart, they are attracted; and when they are at an intermediate distance, their potential energy is at a minimum, requiring the expenditure of work to either approximate or separate them. Thus, work is required to pull apart two objects in intimate contact, whether they be of the same or different material.
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