(n.) A board with sixty-four squares of alternate color, used for playing checkers or draughts.
Example Sentences:
(1) Strains showing occasional antagonism at a particular proportion of concentrations of the test combination, were found to only be indifferent when the mean index of the fractional inhibition concentration of all checkerboard combinations was calculated.
(2) In Experiment 1, newborns differentiated gray from green, from yellow, and from red: For each of these hues they preferred chromatic-and-gray checkerboards over gray squares matched in mean luminance, even though the luminance of the gray checks was varied systematically over a wide range so as to minimize nonchromatic cues.
(3) Using the quantitative induction assay, the checkerboard method and the disc approximation test, clavulanic acid was shown to act as inducer for all species, whereas sulbactam only induced strains of Providencia stuartii.
(4) The fields formed a checkerboard pattern the element size of which variable.
(5) The new Austrian HTC, partly defined by the 9th International Histocompatibility Workshop (9WS), partly by a checkerboard experiment with internationally well defined reference HTC, type for HLA-Dw1 to -Dw7 and an obviously new, so far unknown HLA-DR2 related HLA-D determinant.
(6) The latency of the first reproducible positive peak in the P-VEP was measured monocularly and binocularly for five sizes of phase alterations checkerboard stimuli (range: 120' to 7.5' check widths).
(7) Induction of chemotaxis of LGL by OAG was time and dose-dependent, as confirmed using checkerboard assays.
(8) The released activity was chemotactic by checkerboard analysis.
(9) Responses were obtained to phase-alternating checkerboards of varying check size.
(10) The MTS task employed randomly generated checkerboard-like stimuli presented on a video display.
(11) The stimulus was a checkerboard phase-reversed at the frequency of 1 Hz, binocularly viewed by the subject.
(12) An operant technique was used to train 10-wk.-old infants on a simultaneous discrimination task with a checkerboard cube and a bull's-eye sphere presented in a stationary form.
(13) The combination of peracetic acid and hydrogen peroxide, tested by a checkerboard micromethod, was found to be synergistic.
(14) Initially the responses to checkerboard flash or reversal stimuli were computer-averaged in order to raise the signal above the noise, primarily the electroencephalogram (EEG).
(15) The patterned stimuli used were checkerboard-like matrices containing, on the average, 4, 36, 100, 400, or 900 bits of information.
(16) This stimulated migration was dose-dependent, and by checkerboard analysis was both chemotactic and chemokinetic.
(17) C-cells divided once during the kagome-checkerboard transformation, while G-cells did not divide.
(18) No synergy or antagonism was found by means of the checkerboard titration method used.
(19) Three background conditions were used: a naturalistic landscape photograph, a blank field, and a repeating checkerboard texture that provides strong contours but no information about visual direction.
(20) Consequently, the pattern electroretinogram to reversing checkerboards has to be regarded as a mixture of both pattern- (contrast) and luminance-specific components.
Draughtboard
Definition:
(n.) A checkered board on which draughts are played. See Checkerboard.