Lip balm is a soothing wax that stops lips cracking. A stick of lip balm.
Lips have no oil glands of their own, which is why they dry out before anything else. Lip balm works by sealing rather than moisturising, which is why it has to be reapplied.
1nounlip balmA soothing wax that stops lips cracking.
“The lip balm lived in one coat pocket for the whole winter.”
lip balm is a product.
Lip plus balm, from Latin balsamum, an aromatic resin.
From lip + balm.
Etymology from Wiktionary, CC BY-SA
Practised in Beauty & Cosmetics