inverted hat

Etymology
From its shape, supposed to resemble the profile of a hat turned upside-down.

Noun

 * 1)  A.
 * 2) * 1995 April 30th, Ron Meisenheimer, comp.soft-sys.sas, “ASCII chars and SAS titles”, message 1
 * I’m using PC SAS and would like to get the symbol for infinity in the title of my output. When I [hold down the Alt key and enter 236] with SAS, it shows up correctly onscreen; but when it’s printed out, I get an ‘s’ with an inverted hat over it.
 * 1) * 2002 November 5th, Richard Proctor, perl.perl6.language, “Re: Unicode operators &#91;Was: Re: UTF-8 and Unicode FAQ, demos&#93;”, message 73
 * The Gullimots [under latin-1] become T and t with inverted hats under Latin-2, oe and G with an inverted hat under Latin-3.
 * 1) * 1997 October 1st, Ian James Abbott, uk.media.animation.anime, “EVA”, message 26
 * evangeʹlical (-nj-) The…‘a’ has an inverted hat again; the ‘e’ and ‘i’ in ‘geli’ have inverted hats, making them short.
 * 1) * 2002 November 5th, Richard Proctor, perl.perl6.language, “Re: Unicode operators &#91;Was: Re: UTF-8 and Unicode FAQ, demos&#93;”, message 73
 * The Gullimots [under latin-1] become T and t with inverted hats under Latin-2, oe and G with an inverted hat under Latin-3.
 * 1) * 2011 November 8th, Robert Bonomi, mailing.freebsd.questions, “‘Unprintable’ 8-bit characters”, message 13
 * Now, one (obviously) has to have the basic ‘Roman’ alphabet. [¶] Then there are all the diacritical markings (accent, accent grave, dot umlaut, ring, bar, ‘hat’, inverted hat, etc.) for vowels.
 * 1) * 2011 November 8th, Robert Bonomi, mailing.freebsd.questions, “‘Unprintable’ 8-bit characters”, message 13
 * Now, one (obviously) has to have the basic ‘Roman’ alphabet. [¶] Then there are all the diacritical markings (accent, accent grave, dot umlaut, ring, bar, ‘hat’, inverted hat, etc.) for vowels.

Usage notes

 * The shape suggested by is too vague to allow  the specificity to distinguish between a háček ( ˇ ) and a breve ( ˘ ). The term  avoids this problem, as it can refer to a háček (( ˆ ) → ( ˇ )), but never to a breve. The term’s ambiguousness is demonstrated in its two senses’ shared quotation (dated November 2002), where it occurs twice within the same sentence, first to refer to háčky, and then to a breve.