The 2x2 black square near the middle of this puzzle's grid, e.g., which is part of eight answers

Question:

Answer:

BLOCK

Length:

Similar Crossword Questions:

Number of times this puzzle's theme word appears diagonally in the grid (to complete the puzzle, shade those words plus the Down answers that begin where they meet)
Like aleph in the central black squares of this puzzle's grid
Black Friday destination found in nine of this puzzle's Across answers
Worries, and word anagrammed in part of four puzzle answers
Octet of black squares in the middle of this grid, typographically
Last letter in most plurals (but not in this puzzle's six longest answers, which are the only plurals in this grid)
1967 Box Tops hit about part of a puzzle answer grid?
Angle irons graphically represented by four sets of black squares in this grid, and by letter formations starting in the four longest answers
Game that can follow the first part of this puzzle's four longest answers
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"Hmmmmm ..." [as hinted at by the three groups of black squares in the middle of the grid]
New element whose name will be ratified in January, 2010, and whose symbol appears in the middle of this puzzle's theme answers
Web concerns ... and based on six familiar names hidden in rows 1, 4, 12 and 15 of this puzzle grid, what the black squares in those rows symbolize
On hold ... or what the seven rows of black squares in this puzzle's grid spell in Morse code
Subject of an annual March 14 celebration and of this puzzle, celebrated in both a literal and a numerical way in the first square of the starred answers, reading left to right
Row of black squares preceding or following six puzzle answers, thereby completing them
Word replaced in three answers in this puzzle
Rap sheet letters hidden in this puzzle's longest answers
"End of story" in some of this puzzle's answers
A different one is hidden in each of this puzzle's seven longest answers
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Window, of sorts ... or a hint to completing 10 answers in this puzzle
Word rearranged and hidden in this puzzle's eight longest answers
Ones in charge of a case ... or a literal hint to the eight other longest answers in this puzzle
It uses only the 12 letters A, E, H, I, K, L, M, N, O, P, U and W (like eight long answers in this puzzle)