Crossword Clue: Letter after sigma
Here's the answer to the Letter after sigma crossword clue, with an explanation and where it has appeared.
Definition & answer: TAU
The answer to "Letter after sigma" is TAU. Tau is a 3-letter word made up of 2 vowels and 1 consonant, beginning with T and ending with U. In a crossword grid it occupies a 3-square slot, and each of its letters also forms part of a word crossing it — so even if the clue stumps you, the crossing entries will usually hand you enough letters to fill it in.
Origin & meaning
Tau follows sigma in the Greek alphabet and names a math constant equal to two pi. Its vowel-friendly shape suits grids.
Common usage
Tau turns up frequently in crosswords precisely because of that letter mix. Short, vowel-friendly words like TAU are a constructor's best friend: they interlock cleanly with longer entries and help a grid come together without awkward letter clashes. When you see a 3-letter slot and already have a crossing letter or two, TAU is often quick to confirm — especially once the T or U is in place.
Crossword trivia
Because it is only 3 letters long, TAU appears far more often in daily mini and themed puzzles than longer, more obscure words. Regular solvers come to recognize it on sight, and it is exactly the kind of entry worth committing to memory: the more common short words you know cold, the faster your solve times become.
Stuck on this clue?
If "Letter after sigma" has you stuck, don't force it — jump to the clues crossing this slot instead. Filling in even one or two intersecting letters usually makes TAU obvious. That crossing-first approach is the single most useful habit for improving at crosswords, and it works on everything from the quick daily Mini to a full Sunday grid.
This clue in different puzzles
The clue "Letter after sigma" is just one way to arrive at TAU. Across different puzzles and editors you may see the same answer clued as "Greek T". Recognizing that a single answer can wear many clues is one of the fastest ways to level up as a solver.
Example sentences
- "I had the crossing letters, so writing TAU into the grid took no time at all."
- "Tau is the kind of answer that clicks the moment you spot one letter."
- "Seeing 'Letter after sigma' in the clue list, an experienced solver pencils in TAU almost immediately."
- "Once the T was confirmed by the crossing word, TAU was the only entry that fit."