1650s, from Latin abscindere “to cut off” (see abscissa). Related: Abscinded; abscinding.
to separate by , as a leaf from a stem. verb to separate or be separated by abscission
- 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.
(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 […]
(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 […]