Historical clue formulations

• Outie's counterpart — 2025-09-17
• Result of some cord-cutting, informally — 2025-03-27
• Navel type — 2025-02-19
• Bellybutton type, informally — 2024-01-17
• Feature of many a belly — 2023-01-12
• It might gather lint — 2022-01-23
• Body feature for roughly 90% of people — 2021-09-01
• Navel type — 2021-03-28
• What many a navel-gazer gazes at — 2019-10-27
• Certain navel — 2019-08-21
• Navel formation? — 2018-08-26
• Roughly nine of 10 people have one — 2018-05-05
• Certain navel — 2017-03-05
• Belly button type — 2016-02-23
• Belly button type — 2015-11-02
• Belly button type — 2014-04-30
• Concave belly button — 2013-11-25
• Certain belly button — 2013-10-01
• Concave object of reflection? — 2013-05-26
• Hole just above a belt — 2010-10-24
• About 90% of people have one — 2010-02-05
• Certain navel — 2009-12-08
• Certain navel — 2008-12-30
• Omphalos variety — 2008-12-05
• It doesn't come out of the stomach — 2008-10-10
• Concave belly button — 2008-05-19
• Concave lint trap? — 2008-05-08
• Type of 39-Down — 2008-04-01
• Concave button — 2008-03-09
• Navel type — 2007-02-25
• Belly button type — 2007-02-07
• Lint-collecting bellybutton — 2006-07-25
• Feature of many a stomach — 2006-06-16
• Certain belly button — 2006-02-22
• Navel type — 2005-11-14
• Navel type — 2005-06-12
• Many a navel — 2004-12-14
• Certain navel — 2004-07-18
• Bellybutton type — 2003-04-22
• Nonprotruding navel — 2001-06-03
• Bellybutton type — 1999-03-31
• Navel type — 1998-02-26