This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Plural form of overtone.

"Just in case you are wondering what giblets are doing in the last answer, giblets is the translation of the popular grilled beef restaurant dish ホルモン, or hormone, which I wonder if it has similar overtones to that of the English word from which the Japanese derives."