1. like clockwork with regularity and precision
  2. clockwork any mechanism of geared wheels that is driven by a coiled spring; resembles the works of a mechanical clock
  3. biological clock an innate mechanism in living organisms that controls the periodicity of many physiological functions
  4. psychedelic rock a musical style that emerged in the 1960s
  5. Classical Greek the dialect of Ancient Greek spoken and written in Attica and Athens and Ionia
  6. logical diagram a graphical representation of a program using formal logic
  7. biological group a group of plants or animals
  8. logical proof proof of a logical theorem
  9. politically correct exhibiting political correctness
  10. digital clock a clock that displays the time of day digitally
  11. Clichy-la-Garenne a northwestern suburb of Paris
  12. click-clack a succession of clicks
  13. like crazy with great speed or effort or intensity
  14. like kings in a royal manner
  15. Catholic Church any of several churches claiming to have maintained historical continuity with the original Christian Church
  16. cloakroom a room where coats and other articles can be left temporarily
  17. biological research scientific research conducted by biologists
  18. clocking the time taken to traverse a measured course
  19. longcase clock a pendulum clock enclosed in a tall narrow case
  20. single crochet a crochet stitch

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