Abscise
to separate by , as a leaf from a stem.
verb
to separate or be separated by abscission
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- Abscisic acid
a growth-regulating plant hormone, c 15 h 20 o 4 , that promotes dormancy and the aging and abscission of leaves. abscisic acid (āb-sĭz’ĭk) a plant hormone that maintains the water balance of plants, prevents seed embryos from germinating, and induces the dormancy of buds and seeds. chemical formula: c15h20o4.
- Abscissa
(in plane cartesian coordinates) the x-coordinate of a point: its distance from the y-axis measured parallel to the x-axis. historical examples ordinate represents geo-electric excitation; abscissa, distance from upper surface of flower stalk. life movements in plants, volume ii, 1919 sir jagadis chunder bose the abscissa of such a curve is the reading of the […]
- Abscissae
(in plane cartesian coordinates) the x-coordinate of a point: its distance from the y-axis measured parallel to the x-axis. noun (pl) -scissas, -scissae (-ˈsɪsiː) the horizontal or x-coordinate of a point in a two-dimensional system of cartesian coordinates. it is the distance from the y-axis measured parallel to the x-axis compare ordinate n. 1690s, from […]
- Abscission layer
the layer of specialized, cutinized parenchyma cells that develops in the abscission zone, the disintegration of which causes abscission. noun a layer of parenchyma cells that is formed at the bases of fruits, flowers, and leaves before abscission. as the parenchyma disintegrates, the organ becomes separated from the plant
- Abscission zone
the zone at the base of a leaf petiole, fruit stalk, or branch in which the abscission layer develops.