heterodromousadj.

/hɛtəˈrɒdrəməs/

Etymology: < modern Latin heterodromus, < Greek ἑτερο- hetero- comb. form + -δρομος running + -ous suffix. In modern French hétérodrome.

Running in different directions: opposed to homodromous.

†a. Mechanics. Applied to levers of the first order, in which the power and the weight move in opposite directions. Obsolete.

ΘΚΠ

society > occupation and work > equipment > machine > parts of machines > lever > [adjective] > specific types

heterodromous1710

homodromous1710

1710 J. Harris Lexicon Technicum II. (at cited word) The Wheel, Windlass, Capstand, Crane, &c. are perpetual Heterodromous Leavers.

1728 E. Chambers Cycl. Heterodromus Vectis, in Mechanicks, a Lever wherein the Fulcrum, or Point of Suspension, is between the Weight and the Power.]

b. Botany. Turning in opposite directions on the main stem and on a branch, as the generating spiral of a phyllotaxis.

ΘΚΠ

the world > plants > part of plant > (defined by) distribution, arrangement, or position > [adjective] > homodromous or heterodromous

antidromal1849

homodrome1849

homomalous1854

heterodromous1861

homodromous1861

homodromal1866

antidromous1878

1861 R. Bentley Man. Bot. i. iii. 141 When leaves are alternate, these taken as a whole form a spiral round the axis... In the majority of cases, the direction in both the stem and branches is the same, and it is then said to be homodromous; but instances..occur in which the direction is different, when it is called heterodromous.

1874 R. Brown Man. Bot. 190.

Derivatives

heteˈrodromy n. Botany heterodromous condition.

ΘΚΠ

the world > plants > part of plant > (defined by) distribution, arrangement, or position > [noun] > homodromy or heterodromy

homodromy1880

heterodromy1886

1886 New Sydenham Soc. Lexicon Heterodromy, term applied..when the axial shoot of the stem coils from right to left, whilst that of the branch twists from left to right, or vice versâ.

This entry has not yet been fully updated (first published 1898; most recently modified version published online June 2018).

单词	heterodromous
释义	heterodromousadj. /hɛtəˈrɒdrəməs/ Etymology: < modern Latin heterodromus, < Greek ἑτερο- hetero- comb. form + -δρομος running + -ous suffix. In modern French hétérodrome. Running in different directions: opposed to homodromous. †a. Mechanics. Applied to levers of the first order, in which the power and the weight move in opposite directions. Obsolete. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > lever > [adjective] > specific types heterodromous1710 homodromous1710 1710 J. Harris Lexicon Technicum II. (at cited word) The Wheel, Windlass, Capstand, Crane, &c. are perpetual Heterodromous Leavers. 1728 E. Chambers Cycl. Heterodromus Vectis, in Mechanicks, a Lever wherein the Fulcrum, or Point of Suspension, is between the Weight and the Power.] b. Botany. Turning in opposite directions on the main stem and on a branch, as the generating spiral of a phyllotaxis. ΘΚΠ the world > plants > part of plant > (defined by) distribution, arrangement, or position > [adjective] > homodromous or heterodromous antidromal1849 homodrome1849 homomalous1854 heterodromous1861 homodromous1861 homodromal1866 antidromous1878 1861 R. Bentley Man. Bot. i. iii. 141 When leaves are alternate, these taken as a whole form a spiral round the axis... In the majority of cases, the direction in both the stem and branches is the same, and it is then said to be homodromous; but instances..occur in which the direction is different, when it is called heterodromous. 1874 R. Brown Man. Bot. 190. Derivatives heteˈrodromy n. Botany heterodromous condition. ΘΚΠ the world > plants > part of plant > (defined by) distribution, arrangement, or position > [noun] > homodromy or heterodromy homodromy1880 heterodromy1886 1886 New Sydenham Soc. Lexicon Heterodromy, term applied..when the axial shoot of the stem coils from right to left, whilst that of the branch twists from left to right, or vice versâ. This entry has not yet been fully updated (first published 1898; most recently modified version published online June 2018). < adj.1710
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