Of milk, from which about half of the cream has been removed(adjective)
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Use "semi-skimmed" in a sentence
"A desert of berries or fruit is served “if the nutrient content of the main course is not adequately diverse or if it contains little energy” along with skimmed or semi-skimmed milk and bread."
"Serves 6213 calories per serving750g medium waxy potatoes such as Charlotte, scrubbed but not peeled500ml semi-skimmed milk1 whole garlic bulb, cloves bashed and peeled4 bay leaves12 scratches nutmeg100g Gruyère or other hard, strong cheese, finely grated3 tbsp half-fat crème fraîchePreheat the oven to 180°C/350°F/gas mark 4."
"Going the other way, Jamie Oliver calls for semi-skimmed milk in his hot chocolate."