Definitions

A flying target, usually a disc, made of a mixture of pitch and pulverized limestone rock, used as moving target in sport shooting.

In the United States Public Land Survey System, a baseline is the principal east-west line upon which all rectangular surveys in a defined area are based. The baseline meets its corresponding meridian at the point of origin, or initial point, for the land survey. For example, the baseline for Nebraska and Kansas is shared as the border for both states, at the 40th parallel north. More specifically a baseline may be the line that divides a survey township between north and south. Often, a baseline is marked by other features such as a road or boundary between counties.

a type of rock music, generally soft-style without screaming or aggression, mixed with synthesized music and electronic.

A jacket crown, also known as a dental crown or tooth crown, is a type of dental restoration which completely encircles a tooth or dental implant. It is typically bonded to the tooth using a dental cement. Jacket crowns are often used when a large cavity threatens the health of a tooth. They are typically made from materials such as porcelain or metal.

Japan tallow is a substance obtained from the seeds of the Japanese sumac, Rhus succedanea, or the wax tree. It is a type of vegetable fat or wax that is traditionally used in Japan for making candles, soap, and other materials.

A book fair is a public gathering or event, often held in schools, libraries, or other community spaces, where books are displayed and sold. It provides an opportunity for publishers, authors, and booksellers to promote and sell their books directly to readers or buyers. It often includes other literary activities such as reading sessions, book signing events, workshops, and panel discussions.

Abolishable refers to something, particularly a rule, system, organization or practice, that can be officially ended, eliminated, or discontinued.

A soft-shelled crab is a crustacean, specifically of the swimming crab species, that has recently molted its old exoskeleton and is still soft. The entire animal can be eaten, unlike hard-shell crabs. It is considered a seafood delicacy in several cultures, particularly in American and Asian cuisine.

One who drives something, in any sense of the verb to drive.

Cytoarchitectonics is a branch of neuroanatomy that refers to the study of the cellular composition, arrangement, and distribution of neurons within the brain and spinal cord. It is used to define distinctive regions of the brain based on differences in cellular structures and organization.

a sturdy metal bracket affixed in front of each of the leading wheels of a train to deflect small objects away from the wheels to prevent derailment.

The mathematical concept of a Hilbert space, named after David Hilbert, generalizes the notion of Euclidean space. It extends the methods of vector algebra and calculus from the two-dimensional Euclidean plane and three-dimensional space to spaces with any finite or infinite number of dimensions. A Hilbert space is an abstract vector space possessing the structure of an inner product that allows length and angle to be measured. Furthermore, Hilbert spaces must be complete, a property that stipulates the existence of enough limits in the space to allow the techniques of calculus to be used. Hilbert spaces arise naturally and frequently in mathematics, physics, and engineering, typically as infinite-dimensional function spaces. The earliest Hilbert spaces were studied from this point of view in the first decade of the 20th century by David Hilbert, Erhard Schmidt, and Frigyes Riesz. They are indispensable tools in the theories of partial differential equations, quantum mechanics, Fourier analysis —and ergodic theory, which forms the mathematical underpinning of thermodynamics. John von Neumann coined the term Hilbert space for the abstract concept that underlies many of these diverse applications. The success of Hilbert space methods ushered in a very fruitful era for functional analysis. Apart from the classical Euclidean spaces, examples of Hilbert spaces include spaces of square-integrable functions, spaces of sequences, Sobolev spaces consisting of generalized functions, and Hardy spaces of holomorphic functions.

fig.: To obliterate; to expunge; to blot out; -- used of ideas in the mind or memory

The Achilles tendon is a tough band of fibrous tissue that connects the calf muscles at the back of the lower leg to the heel bone. It is the largest and strongest tendon in the body, used for activities such as walking, running, and jumping. It is named after the Greek mythological hero Achilles, as it is a vulnerable spot, prone to injury or rupture.

The utmost flow of the tide.