One out of several parts combined in a system of aggregation, when each is of the nature of the whole; as, a single cell is an element of the honeycomb.

To compound of elements or first principles.

Any single glass lens within a eyepiece or telescope.

Single lens used in association with others to form a compound construction.

A single part of an image, page, or publication.

a single item in a composition or mix. Can be visual or audible. Sequence The order in which playback or something occurs. Refers to the way a piece of work is arranged. A sequence can be a set of instructions to trigger a device that has the actual sound bytes or video files.

any group of people singled out within a larger group by identifiable behavior patterns, common interests, ethnic similarities, etc.: He worried that the protest rally would attract the radical element.

A group of memory bytes that stores a single data item.

single page in the knowledge system. Every element is represented in the Contents windows as a hierarchy node. An element can either be a topic or an item. A topic synthetically presents some part of the learning material. Items provide testing questions or exercises for drilling the material presented in topics. In the simplest case, topics have a form of a page of text while items are formulated as questions and answers.

Source: DSMC A complete, integrated set of subsystems capable of accomplishing an operational role or function, such as navigation. It is the configuration item (CI) delivered by a single contractor.

A single lens that is a component of a compound lens.

A symbol or group of symbols portraying a single characteristic, trait, or concept

single lens shaped piece of glass that forms part of a compound lens system.