eka-

Word Origin

Chemistry.

a prefix used to designate the first element of the same family in the periodic table beyond the one to whose name it is prefixed, as ekaselenium for technetium.

Origin

< Sanskrit eka one

eka-a prefix primarily used to indicate an element which stands or is assumed to stand in the same family of the periodic table as a specified element especially when not yet isolated: ◆ eka-tungsten.

[Sanskrit eka one; used by Russian chemist, DI Mendeléeff, 1834–1907, to denote a predicted element that should occupy the next lower position to the one designated]

eka-
combining form

ETYMOLOGY International Scientific Vocabulary, from Sanskrit eka one — more at one

: standing or assumed to stand next in order beyond (a specified element) in the same family of the periodic table — in names of chemical elements especially when not yet discovered
eka-lead is the hypothetical element 114

eka-, prefix Chem.|ˈiːkə|[a. Skr. eka one.]Used 1872 in Ann. d. Chemie u. Pharmacie, VIII. Supplementband 196 by D. I. Mendeléeff (1834–1907), Russian chemist, to denote a predicted element that should occupy the next lower position to that so qualified in the same group in the periodic system.1889Jrnl. Chem. Soc. LV. 648 Gallium, which proved to correspond to eka-aluminium of the periodic law..scandium, corresponding to eka-boron..and..germanium, which proved to correspond in all respects to eka-silicum.1931Observer 18 Oct. 22/4 Eight years ago there were six [atomic] numbers corresponding to unknown elements... Both 43 and 75 were known before their discovery as eka-manganeses, from their anticipated similarity to manganese... 85 should be chemically akin to iodine, and so is provisionally called eka-iodine... On Friday the news came from America that eka-caesium had been discovered.1938Ann. Reg. 1937 355 Curie & Savitich..obtained three new series of short period radioactive elements ending possibly in eka-gold, eka-iridium, and eka-rhenium.1955Ann. Reg. 1954 398 It was announced in February that physicists of the University of California had produced element No. 99 provisionally called eka-holmium.1969Daily Tel. 5 May 13/7 Russian scientists at Dubna and Leningrad are looking for element 114, eka-lead, in old mirrors made from lead glass.

eka- /ˈeɪkə/ combining form. L19.

ORIGIN: Sanskrit = one.

Prefixed to the name of an element to denote the element expected or postulated to occupy the next lower position in the same group or subgroup of the periodic table, as eka-bismuth.

eka-
\|ekə, |ākə\ combining form
Etymology: Sanskrit eka one — more at one
: standing or assumed to stand next in order beyond (a specified element) in the same family of the periodic table — in names of chemical elements especially when not yet discovered
< ekacesium (now called francium) >
— compare dvi-

eka-

Prefix

chemistry used to form prototype names for as-yet undiscovered elements

Etymology

Sanskrit एक (eka, “one, first”).

Derived terms

eka-actinium

eka-aluminium

eka-aluminum

eka-astatine

eka-bismuth

eka-boron

eka-francium

eka-gold

eka-hafnium

eka-iridium

eka-lead

eka-manganese

eka-mercury

eka-osmium

eka-platinum

eka-polonium

eka-protactinium

eka-radium

eka-radon

eka-rhenium

eka-silicon

eka-tantalum

eka-thallium

eka-thorium

eka-tungsten

eka-uranium

eka-wolfram

词汇	eka-
词根词缀	Dictionary.com Macquarie MWCD OED SOED Webster Wiktionary eka- Word Origin Chemistry. 1 a prefix used to designate the first element of the same family in the periodic table beyond the one to whose name it is prefixed, as ekaselenium for technetium. Origin < Sanskrit eka one eka-a prefix primarily used to indicate an element which stands or is assumed to stand in the same family of the periodic table as a specified element especially when not yet isolated: ◆ eka-tungsten. [Sanskrit eka one; used by Russian chemist, DI Mendeléeff, 1834–1907, to denote a predicted element that should occupy the next lower position to the one designated] eka- combining form ETYMOLOGY International Scientific Vocabulary, from Sanskrit eka one — more at one : standing or assumed to stand next in order beyond (a specified element) in the same family of the periodic table — in names of chemical elements especially when not yet discovered eka-lead is the hypothetical element 114 eka-, prefix Chem.\|ˈiːkə\|[a. Skr. eka one.]Used 1872 in Ann. d. Chemie u. Pharmacie, VIII. Supplementband 196 by D. I. Mendeléeff (1834–1907), Russian chemist, to denote a predicted element that should occupy the next lower position to that so qualified in the same group in the periodic system.1889Jrnl. Chem. Soc. LV. 648 Gallium, which proved to correspond to eka-aluminium of the periodic law..scandium, corresponding to eka-boron..and..germanium, which proved to correspond in all respects to eka-silicum.1931Observer 18 Oct. 22/4 Eight years ago there were six [atomic] numbers corresponding to unknown elements... Both 43 and 75 were known before their discovery as eka-manganeses, from their anticipated similarity to manganese... 85 should be chemically akin to iodine, and so is provisionally called eka-iodine... On Friday the news came from America that eka-caesium had been discovered.1938Ann. Reg. 1937 355 Curie & Savitich..obtained three new series of short period radioactive elements ending possibly in eka-gold, eka-iridium, and eka-rhenium.1955Ann. Reg. 1954 398 It was announced in February that physicists of the University of California had produced element No. 99 provisionally called eka-holmium.1969Daily Tel. 5 May 13/7 Russian scientists at Dubna and Leningrad are looking for element 114, eka-lead, in old mirrors made from lead glass. eka- /ˈeɪkə/ combining form. L19. ORIGIN: Sanskrit = one. Prefixed to the name of an element to denote the element expected or postulated to occupy the next lower position in the same group or subgroup of the periodic table, as eka-bismuth. eka- \\|ekə, \|ākə\ combining form Etymology: Sanskrit eka one — more at one : standing or assumed to stand next in order beyond (a specified element) in the same family of the periodic table — in names of chemical elements especially when not yet discovered < ekacesium (now called francium) > — compare dvi- eka- Prefix chemistry used to form prototype names for as-yet undiscovered elements Etymology Sanskrit एक (eka, “one, first”). Derived terms eka-actinium eka-aluminium eka-aluminum eka-astatine eka-bismuth eka-boron eka-francium eka-gold eka-hafnium eka-iridium eka-lead eka-manganese eka-mercury eka-osmium eka-platinum eka-polonium eka-protactinium eka-radium eka-radon eka-rhenium eka-silicon eka-tantalum eka-thallium eka-thorium eka-tungsten eka-uranium eka-wolfram See also dvi- tri-
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eka-

eka-

Prefix

Etymology

Derived terms

See also