ˈunderlip
[under-1 5 b. Cf. Du. onderlip, G. unterlippe, Sw. underläpp, Da. underlæbe.]
1. The lower lip of a person, animal, or insect.
| 1669 Holder Elem. Speech 25 The Tongue and under-Lip..are moveable. a 1735 Arbuthnot State Learn. Lilliput Misc. Wks. 1751 I. 145 At that..he put out his Under-Lip. 1737 Challoner Cath. Chr. Instr. (1753) 71 His Tongue a little advanced on his Under-lip. 1826 Kirby & Sp. Entomol. III. xxx. 124 These maxillæ of larvæ were regarded..as parts of the under-lip, on each side of which they are situated. 1855 Tennyson Maud i. ii. 9 An underlip, you may call it a little too ripe, too full. 1882 ‘F. Anstey’ Vice Versâ i, His big underlip drooped rather weakly. |
b. spec. (See quot.)
| 1908 Animal Managem. 32 ‘Upperlip’ and ‘underlip’ are the names used to denote white skin at the edges of the lips [of horses]. |
2. In an organ-pipe: (see quots.).
| 1852 Seidel Organ 78 The under lip, on the foot, and immediately below the language. 1875 Knight Dict. Mech. 1709 The foot is an inverted cone, formed in a similar manner, and having a corresponding indentation, called the under lip. |