Technology glossary

Warming-Induced Emissions

Additional greenhouse-gas emissions from natural systems caused by human-driven warming or its effects. Examples include carbon dioxide and methane released as permafrost thaws, wildfires intensify, and wetlands or freshwaters warm.

Wavefront Shaping

The controlled modification of a wave's phase, amplitude, or polarization across space to direct how it propagates and focuses. In optics, devices such as spatial light modulators can shape light to correct aberrations, focus through scattering media, or form desired patterns.

Weakly Interacting Massive Particle(WIMP)

A hypothetical massive particle that would interact through gravity and possibly the weak nuclear force or another similarly weak interaction. WIMPs are one proposed form of dark matter and are sought through underground detectors, particle colliders and astronomical observations.

Wearable Biosensor

A body-worn device that measures biological or biochemical signals and converts them into data for monitoring or analysis. Examples can track heart activity, movement, temperature, oxygen saturation, glucose, or sweat biomarkers, with accuracy depending on the sensor and conditions of use.

Weight-Four Parity Check

An error-checking operation that measures a shared relationship among four data qubits using an additional qubit.

White Dwarf Accretion

The fall of gas, dust or planetary debris onto a white dwarf. Elements temporarily visible in the star's atmosphere can reveal the composition of the accreted material.

Wide Field Instrument(WFI)

A telescope instrument designed to image a large angular area of the sky in each exposure. It combines a wide field of view with detectors that measure the position, brightness and shape of many objects at once.

Wildfire Plume

The rising column of smoke, gases, ash and heated air produced by a wildfire.

Wind Radius

The distance from a cyclone's centre to the area where winds reach or exceed a specified speed threshold, often reported separately by direction.

Word Error Rate(WER)

A standard measure for comparing a predicted text with the correct text by counting word substitutions, deletions and insertions. A lower percentage is better, but the same score can hide large differences in how seriously individual errors change meaning.

World Simulation

A computational model that represents an environment and how its objects, agents, and physical or social processes change over time. It can be used for games, scientific research, robotics training, forecasting, and testing decisions safely.

Wrinkle Ridge

A low, sinuous ridge formed when horizontal compression folds and faults volcanic plains or other layered terrain. Planetary geologists use the length and geometry of wrinkle ridges to estimate how much a surface has shortened.

X-Ray Tomography

A non-destructive imaging method that reconstructs the internal three-dimensional structure of an object from X-ray measurements taken at many angles. Differences in X-ray attenuation reveal density and material variations without cutting the object open.

Xenocortication

An experimental method that places cortical tissue or organoids from one species into a host of another species, allowing the graft to develop and connect within a living nervous system.

Xenotransplantation

The transplantation of living cells, tissues or organs from one species into another. In medicine, the term commonly describes using genetically modified pig organs in human recipients.

Zeolite

A porous crystalline material with regularly sized channels that can selectively trap or exchange molecules and ions.