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Related to opening snap: pericardial knock, ejection click


1. Informal See snapshot
2. Brit a card game in which the word snap is called when two cards of equal value are turned up on the separate piles dealt by each player
3. American football the start of each play when the centre passes the ball back from the line of scrimmage to a teammate
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


A brief period of extreme (generally cold) weather setting in suddenly, as in a “cold snap.”


A small nuclear power plant in which heat from radioisotope decay in a fuel such as strontium-90 is converted into electric energy, to provide power for spacecraft instrumentation, telemetry, and other applications. Derived from systems for nuclear auxiliary power.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

rivet set, rivet snap, setting punch, snap

rivet set
A tool for shaping the head of a rivet.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


1. An early (IBM 360?) interpreted text-processing language for beginners, close to basic English.

["Computer Programming in English", M.P. Barnett, Harcourt Brace 1969].

2. ["Some Proposals for SNAP, A Language with Formal Macro Facilities", R.B. Napper, Computer J 10(3):231-243, 1967].


1. <programming> To remove indirection, e.g. by replacing a pointer to a pointer with a pointer to the final target (see chase pointers).

The underlying metaphor may be a rubber band stretched through a number of points; if you release it from the intermediate points, it snaps to a straight line from first to last.

Often a trampoline performs an error check once and then snaps the pointer that invoked it so subsequent calls will bypass the trampoline (and its one-shot error check). In this context one also speaks of "snapping links". For example, in a Lisp implementation, a function interface trampoline might check to make sure that the caller is passing the correct number of arguments; if it is, and if the caller and the callee are both compiled, then snapping the link allows that particular path to use a direct procedure-call instruction with no further overhead.
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Microsoft Dynamics Snap

Integration software from Microsoft that enables users to obtain back-office data from its Dynamics CRM and Dynamics AX databases using front-office applications such as Outlook, Word and Excel. Snap provides lookup access to Dynamics CRM and Dynamics AX data as well as search access to SharePoint Server portals. See Microsoft Dynamics.

Snap Camera

A camera application from the maker of Snapchat for Windows and Mac that changes a person's face into an animal or cartoon figure while retaining the normal background. Each transformation is accomplished through a custom "Lens," which can alter only the face to provide an augmented reality (AR), or it can change the entire scene. Snap Camera can be used with any video application that enables camera switching. See Snapchat and augmented reality.

Snap Camera App
With nearly a thousand Lenses in the original download, Snap Camera can take a photo or a video.

A Zoom Snap Camera Session
After installing Snap Camera and switching cameras in the Zoom app, users can have fun. See Zoom videoconferencing.

Snap Server

A popular network-attached storage (NAS) device from HVE ConneXions, LLC. ( Snap Server plugs into an Ethernet switch for extra storage on the network. Powered by a unified software platform called GuardianOS, the same Snap Server can be accessed by Windows, Mac and Unix clients. See NAS.

An Early Snap Server
One would wish that all devices in computing could hook up as easily as the Snap Server. Once connected to an Ethernet switch, it is available to Windows, Mac and Unix clients. (Image courtesy of Snap Appliance, a division of Adaptec Inc.)


A very popular mobile messaging service from Snap Inc. that sends a photo or video to someone that lasts only up to 10 seconds before it disappears. During that time, the recipient can take a screenshot, and the sender is notified that it was taken. Snapchat was introduced in 2011, and three years later, video chat and messaging were added. See Snapchat Spectacles, Snapcash and Snap Camera.

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References in periodicals archive ?
Suddenly, he felt the opening snap. His feet came together abruptly just as he hit the water, feet first at a sharp angle.
at MH Rawalpindi ,installed cardiac facilities like phono cardiography and others .He was the first teacher of medicine who introduced to us the new concepts of cardiology like opening snap, cardiac clicks and others .A thorough gentleman, he was humble to the core ,hardworking and totally devoted to his patients and students.
The younger linebackers aren't on the field for the opening snap, but they're in a regular rotation with their more experienced teammates.