
1) Adventitious 2) By happenstance 3) Casual 4) Chance 5) Extrinsic 6) Fluky 7) Fortuitous 8) Happening by chance 9) Inadvertent 10) Incidental 11) Involuntary 12) Nonessential 13) Not deliberate 14) Not planned 15) Random 16) Totally unplanned 17) Unexpected 18) Unintended 19) Unintentional 20) Unplanned
Found on
https://www.crosswordclues.com/clue/accidental
[music] In music, an accidental is a note whose pitch (or pitch class) is not a member of the scale or mode indicated by the most recently applied key signature. In musical notation, the sharp ({music|sharp}), flat ({music|flat}), and natural ({music|natural}) symbols, among others, are used to mark such notes, and those symbols may themsel...
Found on
http://en.wikipedia.org/wiki/Accidental_(music)

• (a.) Happening by chance, or unexpectedly; taking place not according to the usual course of things; casual; fortuitous; as, an accidental visit. • (a.) Nonessential; not necessary belonging; incidental; as, are accidental to a play. • (n.) A property which is not essential; a nonessential; anything happening accidentally. • (...
Found on
http://thinkexist.com/dictionary/meaning/accidental/

happening unexpectedly or by chance.
Found on
http://users.ugent.be/~rvdstich/eugloss/DIC/dictio01.html

Pyroclastic rocks that are formed from fragments of non-volcanic rocks or from volcanic rocks not related to the erupting volcano.
Found on
http://volcano.oregonstate.edu/glossary/1

in music, sign placed immediately to the left of (or above) a note to show that the note must be changed in pitch. A sharp () raises a note by a ... [4 related articles]
Found on
http://www.britannica.com/eb/a-z/a/10

(n.) An animal accidentally living in a cave, usually either fallen or washed in, but can include those carried in: i.e., parasites on mammals, other vertebrates or invertebrates. Used for both aquatic and terrestrial species.
Found on
http://www.cancaver.ca/docs/glossary.htm

A musical notation symbol used to raise or lower The pitch of A note
Found on
http://www.encyclo.co.uk/local/20596

Happening unexpectedly or by chance. ... (18 Nov 1997) ...
Found on
http://www.encyclo.co.uk/local/20973

(ak″sĭ-den´tәl) occurring by chance, unexpectedly, or unintentionally. nonessential; not innate or intrinsic.
Found on
http://www.encyclo.co.uk/local/21001

Pyroclastic rocks that are formed from fragments of non-volcanic rocks or from volcanic rocks not related to the erupting volcano.
Found on
http://www.encyclo.co.uk/local/21455

Accidentals are sharps, flats, and/or naturals that aren't in the key signature. They aren't in the music 'accidentally,' but it's easy to make mistakes if you don't notice them!
Found on
http://www.encyclo.co.uk/local/22289
Ac`ci·den'tal adjective [ Confer French
accidentel , earlier
accidental .]
1. Happening by chance, or unexpectedly; taking place not according to the usual course of things; casual; fortuitous; as, an
accidental visit.
2. Nonessential; not necessary belonging; inc...
Found on
http://www.encyclo.co.uk/webster/A/13

In music an accidental is a sharp, flat, or natural, occurring not at the commencement of a piece of music as the signature, but before a particular note.
Found on
http://www.probertencyclopaedia.com/browse/VA.HTM

a bird or bird species when it shows up outside of its normal range.
Found on
http://www.sialis.org/glossary.htm

This an all encompassing term for prefixing a Natural, Double Flat, Flat, Sharp, or Double Sharp to a note. The accidental is primarily used to indicate playing a note outwith the current key. The effect of the use of an accidental applies to all subsequent notes of the same pitch within the same bar, unless overridden by the use of another acciden...
Found on
http://www.songstuff.com/glossary/A

[
adj] - occurring or appearing or singled out by chance 2. [adj] - associated by chance and not an integral part 3. [adj] - without intention 4. [n] - a musical notation that makes a note sharp or flat or natural although that is not part of the key signature
Found on
http://www.webdictionary.co.uk/definition.php?query=accidental

accidental (ak' suh DEN t'l) Happening by chance; belonging but not essential; unplanned, unintentional, unpremeditated, uncalculated; unexpected, fortuitous; chance, random: 'Our meeting on the street was purely accidental.'
Found on
http://www.wordinfo.info/words/index/info/view_unit/3293/

Vagrant
Found on
https://birds.iitk.ac.in/glossary?page=3

the sharpening or flattening of a particular note not indicated in the key signature of a piece; the naturalizing of a note that is sharpened or flattened according to the key signature.
Found on
https://education.ket.org/resources/music-glossary/
adventitious adjective associated by chance and not an integral part; `poetry is something to which words are the accidental, not by any means the essential form`- Frederick W. Robertson; `they had to decide whether his misconduct was adventitious o...
Found on
https://www.encyclo.co.uk/local/20974

In music notation, a sharp (#), flat (b), or natural ([natural]) sign preceding a note which changes the pitch of the note by a semitone up (#), down (b), or back to normal ([natural]). Less common is the double sharp (##
Found on
https://www.encyclo.co.uk/local/21221

a sharp, fiat, or natural sign.
Found on
https://www.encyclo.co.uk/local/22288

happening by chance or accident; not planned; unexpected: an accidental meeting. · nonessential; incidental; subsidiary: accidental benefits. · relating to or indicating sharps, flats, or naturals.
Found on
https://www.infoplease.com/dictionary/accidental
No exact match found.