1. laborious characterized by effort to the point of exhaustion
  2. flavoursome full of flavor
  3. liposome an artificially made microscopic vesicle into which nucleic acids can be packaged; used in molecular biology as a transducing vector
  4. Labrouste French architect who was among the first to use metal construction successfully (1801-1875)
  5. Laburnum flowering shrubs or trees having bright yellow flowers
  6. flavorsome full of flavor
  7. layperson someone who is not a clergyman or a professional person
  8. laboriously in a laborious manner
  9. labour camp a penal institution for political prisoners who are used as forced labor
  10. awesome inspiring admiration or wonder
  11. laparotomy surgical incision into the abdominal wall
  12. foursome four people considered as a unit
  13. cumbersome difficult to handle or use because of size or weight
  14. lubber's hole hole in a platform on a mast through which a sailor can climb without going out on the shrouds
  15. Labourite a member of the British Labour Party
  16. pursue follow in an effort to capture
  17. labrocyte a large connective tissue cell that contains histamine and heparin and serotonin which are released in allergic reactions or in response to injury or inflammation
  18. ribosome a particle in a cell that helps synthesize proteins
  19. lysosome an organelle found in the cytoplasm of most cells
  20. lonesome marked by sadness from being by oneself