directivityn.

/dɪrɛkˈtɪvɪti/

/dʌɪrɛkˈtɪvɪti/

Etymology: < directive adj. + -ity suffix.

1. The quality or state of being directed by a vital force or power as distinguished from the physical forces, spec. as a theory of evolution.

ΘΚΠ

the world > life > biology > theories > [noun] > of genetics or evolution

theory of preformation1756

Darwinizing1807

development hypothesis1845

generationism1847

theory of evolution1858

Darwinism1860

Darwinianism1861

monogenesis1864

monogenism1865

monogeny1865

pangenesis1868

evolutionism1869

phylogeny1869

polygenism1871

derivation1874

phylogenesis1875

transformism1878

biogenetic law1879

gastraea theory1879

fortuitism1881

organicism1883

hereditism1884

kinetogenesis1884

Lamarckianism1884

Lamarckism1884

neo-Lamarckianism1884

monogenesy1885

neo-Lamarckism1887

preformationism1890

neo-Darwinism1891

blastogenesis1893

Haeckel-ismus1894

Weismannism1894

preformism1895

Haeckelism1899

mutation theory1902

directivity1903

Mendelianism1903

Mendelism1903

hereditarianism1906

mutationism1912

selectionism1912

hologenesis1931

parsimony1931

Morganism1934

Lysenkoism1948

neutralism1972

punctuated equilibrium1972

saltationism1975

punctuationism1977

punctuationalism1978

adaptationism1980

geneticism1984

adaptationalism1985

1903 Daily Chron. Apr. That directivity which could not be explained without the power of the Deity behind it.

1907 Hibbert Jrnl. Oct. 150 Sheep, oxen, horses, and even geese may be feeding in the same grass-land. In each case the molecular compounds of the grass are identical, but they find themselves ultimately disposed in very different arrangements in the different animals. This can only be possible under the influence of directivity, but ‘directing’ differently in each creature.

2. The property or degree of being directional (see directional adj. 5). Also attributive.

ΘΚΠ

the world > space > direction > [noun] > directional quality

directivity1928

directionality1951

1928 Jrnl. Inst. Electr. Engineers 66 ii. 955 General considerations of the directivity of beam systems.

1930 Techn. News Bull., U.S. Bureau of Standards Dec. 117/2 Directivity of reception or transmission, or both, will inform the pilot of the direction of danger.

1935 Proc. IRE 23 357 Experiments with directivity steering for fading reduction.

1935 Proc. IRE 23 357 It has been noticed in the past that fading was affected by the directivity of the receiving antenna.

This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2021).

单词	directivity
释义	directivityn. /dɪrɛkˈtɪvɪti//dʌɪrɛkˈtɪvɪti/ Etymology: < directive adj. + -ity suffix. 1. The quality or state of being directed by a vital force or power as distinguished from the physical forces, spec. as a theory of evolution. ΘΚΠ the world > life > biology > theories > [noun] > of genetics or evolution theory of preformation1756 Darwinizing1807 development hypothesis1845 generationism1847 theory of evolution1858 Darwinism1860 Darwinianism1861 monogenesis1864 monogenism1865 monogeny1865 pangenesis1868 evolutionism1869 phylogeny1869 polygenism1871 derivation1874 phylogenesis1875 transformism1878 biogenetic law1879 gastraea theory1879 fortuitism1881 organicism1883 hereditism1884 kinetogenesis1884 Lamarckianism1884 Lamarckism1884 neo-Lamarckianism1884 monogenesy1885 neo-Lamarckism1887 preformationism1890 neo-Darwinism1891 blastogenesis1893 Haeckel-ismus1894 Weismannism1894 preformism1895 Haeckelism1899 mutation theory1902 directivity1903 Mendelianism1903 Mendelism1903 hereditarianism1906 mutationism1912 selectionism1912 hologenesis1931 parsimony1931 Morganism1934 Lysenkoism1948 neutralism1972 punctuated equilibrium1972 saltationism1975 punctuationism1977 punctuationalism1978 adaptationism1980 geneticism1984 adaptationalism1985 1903 Daily Chron. Apr. That directivity which could not be explained without the power of the Deity behind it. 1907 Hibbert Jrnl. Oct. 150 Sheep, oxen, horses, and even geese may be feeding in the same grass-land. In each case the molecular compounds of the grass are identical, but they find themselves ultimately disposed in very different arrangements in the different animals. This can only be possible under the influence of directivity, but ‘directing’ differently in each creature. 2. The property or degree of being directional (see directional adj. 5). Also attributive. ΘΚΠ the world > space > direction > [noun] > directional quality directivity1928 directionality1951 1928 Jrnl. Inst. Electr. Engineers 66 ii. 955 General considerations of the directivity of beam systems. 1930 Techn. News Bull., U.S. Bureau of Standards Dec. 117/2 Directivity of reception or transmission, or both, will inform the pilot of the direction of danger. 1935 Proc. IRE 23 357 Experiments with directivity steering for fading reduction. 1935 Proc. IRE 23 357 It has been noticed in the past that fading was affected by the directivity of the receiving antenna. This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2021). < n.1903
随便看	etc of nisi prius etc of obligation etc of parts etc of quality etc of receipt etc of reckoning etc of relief etc of speculation etc of the field etc of the game etc of the manse etc of the rising sun etc of the setting sun etc of virtu etc of virtue etc of weeks etc of workmanship etc of, on, with war etc off his or her perch etc off like a bride's nightie etc off the books etc off the map etc off-hand etc offal to a bear etc offence to