1. production line mechanical system in a factory whereby an article is conveyed through sites at which successive operations are performed on it
  2. product line a particular kind of product or merchandise
  3. protriptyline tricyclic antidepressant used to treat clinical depression
  4. credit line the maximum credit that a customer is allowed
  5. prisonlike resembling a prison
  6. regression line a smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line
  7. superstitious notion an irrational belief arising from ignorance or fear
  8. predetermine establish beforehand
  9. predatory animal any animal that lives by preying on other animals
  10. Proteus anguinus European aquatic salamander with permanent external gills that lives in caves
  11. party line the policy of a political group
  12. predetermination a mental determination or resolve in advance
  13. protozoan of or relating to the Protozoa
  14. protozoon any of diverse minute acellular or unicellular organisms usually nonphotosynthetic
  15. Robert Anson Heinlein United States writer of science fiction (1907-1988)
  16. parotid gland a large salivary gland that produces 50% of daytime saliva
  17. parotid vein parotid branches of the facial vein
  18. prototherian primitive oviparous mammals found only in Australia and Tasmania and New Guinea
  19. transmission line a conductor for transmitting electrical or optical signals or electric power
  20. borderline a line that indicates a boundary

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