Glossary

A hydrogen isotope twice the mass of ordinary hydrogen. Needed for heavy water.

Relating to the historical developments and changes occurring in language.

Deep Structure. The tree providing a place for words as defined by phrase structure rules.

Rocks formed from magma (molten material). Classified on the basis of texture and mineral composition. Examples: granite, basalt, pumice.

Originating or occurring among the stars.

One of two or more forms of an element with the same atomic number and chemical behavior but different atomic mass.

Study of the structure, sounds, meaning, and history of language.

Preexisting rocks reformed by heat and pressure. Examples: slate and marble.

Nonterrestrial objects surviving passage through the Earth's atmosphere. Often divided into three groups: siderites (iron meteorites), aerolites (meteorites primarily composed of silicates), and siderolites (stony iron meteorites).

Smallest meaningful part of a word.

Creation of nucleons (neutrons and protons). Typically discussed when formulating theories about the origins of the universe.

Rocks created from hardened layers of sediment comprised of organic and inorganic material. Classified on the basis of chemical and particle shape and size. Examples: sandstone, shale, and coal.

Study of the relationship between words and meaning.

An instrument calibrated to measure transmitted energy whether radiant intensities at various wavelengths, the refractive indices of prism materials, or radiation.

Surface Structure. The phrase tree formed when applying movement transformations to the d-structure.

Concerning language as it exists at a single point in time.

Deuterium: Diachronic: D-Structure: Igneous:

Interstellar: Isotope:

Linguistics: Metamorphic:

Meteors:

Morpheme: Nucleosynthesis:

Sedimentary:

Semantics: Spectrometer:

S-Structure:

Synchronic: Trace:

A silent element in a sentence which still indicates the d- structure position of a moved phrase.