[ noun ] (botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground
Used in print(Organic Gardening and Farming,...)
A light , porous mulch applied now keeps the roots cool and the soil soft during these early days of growth .
That encourages rooting , and the better developed the roots , the larger and more plentiful the flowers .
As_soon_as an experimental tug assures you that roots have taken_over , cut it off from the mother plant .(A. N. Nagaraj and L. M. Black, "Localization of...)
Root and stem tumors from sweet_clover plants infected with WTV were quick-frozen in liquid_nitrogen , embedded in ice , and cut at 3 - 6 m in a cryostat maintained at - 16 ` to - 20 ` .
Sections of sweet_clover stem and root tumors were treated with 1 : 10 solution of * * f for 30_minutes , washed in buffered saline for 15_minutes , stained with * * f for 30_minutes , and washed for 15_minutes in PBS .
plant_organ licorice_root ginseng pneumatophore senega chicory salsify Hottentot_bread horseradish calamus radish taro mandrake_root prop_root cassava carrot parsnip sarsaparilla_root briarroot taproot adventitious_root orrisroot rootlet root_system bark root_cap root_hair parenchyma botany
[ noun ] (linguistics) the form of a word after all affixes are removed
"thematic vowels are part of the stem"
Used in print(A.L. Kroeber, "Semantic Contribution of Lexicostatistic...)
Thomas also presents a simple equation for deriving an index of persistence , which weights not_only the number of stems ( ' roots ' ) per meaning , but their relative_frequency .
As to relative_frequencies of competing roots ( 7 - 1 vs. 4 - 4 , etc_. ) , Thomas with his ' weighting ' seems to be the first to have considered the significance this might have .
[ noun ] the place where something begins, where it springs into being
"the Italian beginning of the Renaissance" "Jupiter was the origin of the radiation" "Pittsburgh is the source of the Ohio River" "communism's Russian root"
Used in print(Harold Rosenberg, "The Trial and Eichmann"...)
These questions touch the root of confusion in the prosecution 's case .(R. F. Shaw, "The `Private Eye`"...)
Now , although the roots of the mystery_story in serious literature go_back as far as Balzac , Dickens , and Poe , it was not until the closing decades of the 19_th century that the private_detective became an established figure in popular fiction .
[ noun ] (mathematics) a number that when multiplied by itself some number of times equals a given number
Used in print(Kenneth Hoffman and Ray Kunze, Linear Al...)
Such an operator is obviously the zero operator ; for since it is nilpotent , the minimal polynomial for this operator is of the form * * f for some * * f ; but then since the operator is diagonalizable , the minimal polynomial cannot have a repeated root ; hence * * f and the minimal polynomial is simply x , which says the operator is 0 .
[ noun ] (mathematics) the set of values that give a true statement when substituted into an equation
Used in print(R. P. Jerrard, "Inscribed squares in plane curves"...)
The roots of this equation are just the ordinates of the intersections of the graph of b with a straight_line of unit slope through **f in the b-plane ( the plane of the graph of b ) .
[ verb ] cause to take roots
[ verb ] plant by the roots
[ noun ] Last name, frequency rank in the U.S. is 1834