shearography
n.— «In shearography, the part being tested is illuminated by an expanding laser beam, and its image is taken with an image-shearing camera.…Two images are taken. One image is made of the part in the undeformed state, and a second image is made after deformation. The processed film produces a fringe pattern that depicts the gradient of the surface displacements due to the deformation.» —by Tom Drozda et al. Tool and Manufacturing Engineers Handbook (Vol 4: Quality Control and Assembly) June 1, 1986. (source: Double-Tongued Dictionary)
Further reading
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There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...