Light source with a filament Crossword Clue

We have the 4-letter answer for Light source with a filament crossword clue, last seen in the USA Today Crossword March 29, 2026 puzzle. Sometimes we all need some help finding the answer!

Light source with a filament Crossword Answer

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Helpful Hints

(noun)
1. electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
2. lower or hindmost part of the brain; continuous with spinal cord; (`bulb’ is an old term for medulla oblongata)

Hint 2: Clue Definitions

FILAMENT (noun)
1. a very slender natural or synthetic fiber
2. a threadlike structure (as a chainlike series of cells)
SOURCE (noun)
1. a publication (or a passage from a publication) that is referred to
2. someone who originates or causes or initiates something
SOURCE (verb)
1. get (a product) from another country or business
2. specify the origin of

Hint 3: Anagram

Unscramble the letters below to solve for today's answer.
BLUB

More USA Today Crossword (3/29/2026) Answers

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20. "That's a pass from me"

23. On an even __: steady

24. Casual eatery with American fare

25. Susan who played Laurie on "The Partridge Family"

27. Marry

29. "Dog ___ Are Over" (Florence and the Machine song)

32. Currently being developed

37. ___ Lisa

39. Stay away from

40. Things that don't warrant any concern

42. Uber competitor

43. Beef cut named for a letter

44. Xenon or argon

45. American currency, for short

47. Bewitch

48. Writer and performer Vaid-Menon

50. Tiny amount

52. Urgent request

53. "No need to discuss this anymore"

61. Danger

62. Cook briefly on high heat

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65. The ___ of my existence

66. Become droopy

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All Answers

Down

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4. Cacio e ___

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10. Help commit a crime

11. "Here's some useful information"

13. ___ vera jelly

17. Seethed

21. Went by plane

22. 'The Simpsons' character Flanders

25. Watch face

26. Feeling associated with the color green

28. "You aren't gonna like this . . ."

30. "No need to wait for me!"

31. Move furtively

33. Becomes very successful

34. Flowy spa garment

35. American painter Simmie

36. ___, cos, tan

38. Donkey

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49. Doesnt bother

51. Lukewarm

52. Bombard

53. "Stay tuned for more info"

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All Answers