Complete set of 12 shapes formed by this puzzle's black squares

Question:

Answer:

PENTOMINOES

Length:

Similar Crossword Questions:

How this puzzle's black squares are arranged
Row of black squares preceding or following six puzzle answers, thereby completing them
On hold ... or what the seven rows of black squares in this puzzle's grid spell in Morse code
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
Like aleph in the central black squares of this puzzle's grid
Trains, in a way, and the key to 18 of this puzzle's black squares. (Ones that begin with the keyword are asterisked. The others are for you to discover.)
Angle irons graphically represented by four sets of black squares in this grid, and by letter formations starting in the four longest answers
Puzzle based on Latin Squares
Rhyme runaway, and how this puzzle's theme answers are formed?
The word, as suggested by the saying formed by the ends of this puzzle's four longest answers
What you're doing as you complete this puzzle
Fills, as black squares
Common interface that is a model for several squares in this puzzle
What's revealed by connecting the special squares in this puzzle in order
What's been deposited in four squares of this puzzle, expressed both by name and by symbol
What spouse does, step 4 [hint: look at the black squares of the grid]
TREASURE HUNT STEP 2 (include black squares)
It's zero in free-fallÂ—and, put another way, a hint to how the four longest puzzle answers were formed
Drink cooler ... or a hint to six squares in this puzzle's answer
Octet of black squares in the middle of this grid, typographically
Fans of black-and-white squares
Close associates, and a hint to this puzzle's highlighted squares
Question asked by a customs officer or a kid on Christmas ... with a hint to this puzzle's circled squares
Company "sorted" in this puzzle's circled squares
"Apt" geographical element needed to complete the answers to 10 of this puzzle's clues