1. double blind a test procedure in which the identity of those receiving the intervention is concealed from both the administrators and the subjects until after the test is completed; designed to reduce or eliminate bias in the results
  2. double bind an unresolvable dilemma
  3. double bond a covalent bond in which two pairs of electrons are shared between two atoms
  4. blue-blind inability to see the color blue or to distinguish the colors blue and yellow
  5. double clinch a clinch with two loops
  6. tableland a relatively flat highland
  7. double bed a bed wide enough to accommodate two sleepers
  8. double-chinned having sagging folds of flesh beneath the chin or lower jaw
  9. double-dealing acting in bad faith
  10. double obelisk a character used in printing to indicate a cross reference or footnote
  11. pebble plant any of several South African plants of the genus Mesembryanthemum cultivated for showy pink or white flowers
  12. double-bedded having a double bed
  13. double birdie shoot two strokes under par
  14. double boiler two saucepans, one fitting inside the other
  15. double agent a spy who works for two mutually antagonistic countries
  16. double flat a musical notation of two flats in front of a note indicating that it is to be lowered by two semitones
  17. double gold very tall branching herb with showy much-doubled yellow flower heads
  18. double knit a knit fabric similar to jersey that is made with two sets of needles producing a double thickness joined by interlocking stitches
  19. double play the act of getting two players out on one play
  20. double-blind study an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment

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