Below are possible answers for the crossword clue Long narrow aperture.
4 letter answer(s) to long narrow aperture
SLOT
(computer) a socket in a microcomputer that will accept a plug-in circuit board; "the PC had three slots for additional memory"
a position in a grammatical linguistic construction in which a variety of alternative units are interchangeable; "he developed a version of slot grammar"
a position in a hierarchy or organization; "Bob Dylan occupied the top slot for several weeks"; "she beat some tough competition for the number one slot"
a slot machine that is used for gambling; "they spend hours and hours just playing the slots"
a small slit (as for inserting a coin or depositing mail); "he put a quarter in the slot"
a time assigned on a schedule or agenda; "the TV program has a new time slot"; "an aircraft landing slot"
assign a time slot; "slot a television program"
the trail of an animal (especially a deer); "he followed the deer's slot over the soft turf to the edge of the trees"
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