Plural form of inside. guts, intestines, innards(noun)
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Use "insides" in a sentence
"Scoop out the insides from the Karelas by cutting them into small pieces, using a sharp knife."
"Thu 10/22/09 6: 48 PM tuna salad past it’s expiration date, pumpkin insides, apple cores, the gum from underneath my shoe, the stuff I swept out from underneath my kids beds, the after effects of a sixth grade science experiment gone horribly wrong …"
"The insides were a bright green jelly; the seven-chambered heart continued to pulse in the dust."