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

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n. Plural form of deltoid.

"Last Wednesday morning in a renovated turnbuckle factory in Park Slope, six female performers with significant deltoids were warming up on trapeze swings when a neighborhood man wandered in through the studio's barn-like doors."

playacting    bourrelet    formulator    office    darkness    mudguard    canthus    matchbook    laughingstock    arrondisement