A surname from German.

A surname from Dutch.

A town and district in Carinthia, Austria.

(chemistry, often in the plural) The relatively weak attraction between neutral atoms and molecules arising from polarization induced in each particle by the presence of other particles.

plural of van der Waals force

(thermodynamics) a gas that follows the van der Waals equation, (P+a/(v²))(v-b)=RT

(chemistry) The strain resulting from van der Waals repulsion when two substituents in a molecule approach each other with a distance less than the sum of their van der Waals radii.

(mathematics) In Ramsey theory, a theorem stating that, for any given positive integers r and k, there is some number N such that if the integers {1, 2, ..., N} are colored, each with one of r different colors, then there are at least k integers in arithmetic progression whose elements are of the same color.

Obtained by derivation; not radical, original, or fundamental. / Imitative of the work of someone else.

Something derived. / (linguistics) A word that derives from another one. / (finance) A financial instrument whose value depends on the valuation of an underlying asset; such as a warrant, an option etc.