The doctrine whereby geologic processes (→ erosion, → deposition, → compaction, and → uplift) observed at Earth's surface now are the same that have shaped Earth's landscape over long periods of time in the past. The term uniformitarianism was first used in 1832 by William Whewell, to present an alternative explanation for the origin of the Earth. The prevailing view at that time was that the Earth was created through supernatural means and had been affected by a series of catastrophic events such as the biblical Flood. This theory is called → catastrophism. The ideas behind uniformitarianism originated with the work of Scottish geologist James Hutton. In 1785, Hutton presented at the meetings of the Royal Society of Edinburgh that the Earth had a long history and that this history could be interpreted in terms of processes currently observed. For example, he suggested that deep soil profiles were formed by the weathering of bedrock over thousands of years. He also suggested that supernatural theories were not needed to explain the geologic history of the Earth (PhysicalGeography.net).
The state or quality of being uniform.
yegânestan (#), yegânidan (#)
To make or become a single unit or entity. → grand unified theory
M.Fr. unifier, from L.L. unificare "to make one," from L. uni-, → one, + facere "to make" (cf. Fr. faire, Sp. hacer), from PIE base *dhe- "to put, to do" (cognate with Mod.Pers. dâdan "to give;" O.Pers./Av. dā- "to give, grant, yield," dadāiti "he gives; puts;" Skt. dadáti "puts, places;" Hitt. dai- "to place;" Gk. tithenai "to put, set, place;" Lith. deti "to put;" Czech diti, Pol. dziac', Rus. det' "to hide," delat' "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do").
Yegânestan, yegânidan "to make one," infinitive from yek, → one.
Difficult or impossible to believe.
General: The act of uniting two or more things.
M.E. from O.Fr. union from L.L. unionem (nominative unio) "oneness, unity," from unus, → one, cognate with Pers. yek, as below.
Existing as the only one or as the sole example.
From Fr. unique, from L. unicus "single, sole," from unus, → one.
Yektâ "unique," from yek, → one, + tâ "fold, plait, ply; piece, part" (Mid.Pers. tâg "piece, part").
The state or condition of being → unique.
Noun from → unique.
Fr.: théorème d'unicité
1) Physics: A → potential that satisfies both
→ Poisson's equation and the
→ boundary conditions
pertinent to a particular field is the only possible potential.
yekâ (#), yekân (#)
A quantity or dimension adopted as a standard of measurement.
Back formation from → unity.
Yekâ, yekân, from yek, → one.
Fr.: vecteur unité
A vector of length 1, also called a direction vector.
→ unit + -ary.
goruh-e yekâyi, ~ yekâni
Fr.: groupe unitaire
The set of n × n unitary matrices (→ unitary matrix).
mâtris-e yekâyi, ~ yekâni
Fr.: matrice unitaire
A square matrix whose inverse equals its adjoint.
Fr.: opérateur unitaire
tarâdis-e yekâyi, ~ yekâni
Fr.: transformation unitaire
A transformation whose reciprocal is equal to its Hermitian conjugate.
To join, combine, or incorporate so as to form a single whole or unit.
M.E. uniten, from L. unitus, p.p. of unire "to unite," from unus, → one.
Formed by or resulting from the union of two or more persons or things.
P.p. of → unite.
The state or condition of being one.
M.E. unite, from O.Fr., from L. unitatem "oneness, sameness, agreement," from unus, → one.
Yeki, noun from yek, → one.
Statistics: Involving only one variable.