1560s, to remove (a nut, etc.) from a shell, from shell (n.). The meaning to bombard with shells is first attested 1856. To shell out disburse (1801) is a figurative use from the image of extracting nuts. Related: Shelled; shelling.
There are 14 calories in 1 cup, slices (3 oz) of Nopales (Cactus Leaf), raw. You'd need to walk 4 minutes to burn 14 calories. Visit CalorieKing to see calorie count and nutrient data for all portion sizes.
All of these things will affect the amount of calories you can expect to find. 1  In an avocado that weighs 145 grams there are about 232 calories. 2  In an avocado that weighs 201 grams there are about 322 calories. 3  In a cup of sliced avocados that weighs 146 grams there are about 234 calories.