| ANTIHELIX | • antihelix n. (Anatomy) The curved prominence of cartilage of the external ear, within or in front of the helix. • ANTIHELIX n. the curved elevation of the cartilage of the ear, within or in front of the helix, also ANTHELIX. |
| CLERIHEWS | • clerihews n. Plural of clerihew. • Clerihews n. Plural of Clerihew. (Alternative letter-case form of clerihews.) • CLERIHEW n. a light verse quatrain rhyming AABB and usually dealing with a person named in the initial rhyme. |
| DIHEDRALS | • dihedrals n. Plural of dihedral. • DIHEDRAL n. the angle between two planes, also DIEDRAL. |
| DIHEDRONS | • dihedrons n. Plural of dihedron. • DIHEDRON n. a flattened double pyramid. |
| DRERIHEAD | • DRERIHEAD n. (Spenser) dreariness, also DREARIHEAD, DREARIHOOD. |
| DROWSIHED | • drowsihed n. Obsolete form of drowsihead. • DROWSIHED n. (Spenser) drowsiness, also DROWSIHEAD. |
| HARDIHEAD | • hardihead n. (Obsolete) Alternative form of hardihood. • hardihead n. (Countable) Alternative form of hardyhead (“the fish”). • HARDIHEAD n. (archaic) hardihood, boldness, also HARDIHOOD, HARDIMENT. |
| HEMIHEDRA | • hemihedra n. Plural of hemihedron. • HEMIHEDRON n. a solid derived in a hemihedral way, such as a tetrahedron. |
| HEMIHEDRY | • hemihedry n. The condition of being hemihedral. • HEMIHEDRY n. a property of crystals of being hemihedral. |
| LOWLIHEAD | • lowlihead n. (Archaic) The state of being lowly; meekness; humility. • LOWLIHEAD n. (archaic) humility. |
| LUSTIHEAD | • lustihead n. (Obsolete) Lustfulness, delight; licentiousness. • LUSTIHEAD n. (archaic) lustiness, also LUSTIHOOD. |
| PERIHELIA | • perihelia n. Plural of perihelion. • perihelia n. Plural of perihelium. • PERIHELION n. the point of the orbit of a planet or a comet at which it is nearest to the sun, as opposed to aphelion. |
| SEEMLIHED | • seemlihed n. Alternative form of seemlihead. • SEEMLIHED n. (obsolete) seemliness, also SEEMLIHEAD, SEEMLYHED. |
| TRIHEDRAL | • trihedral adj. (Geometry) Having three plane faces that meet at a common point. • TRIHEDRAL n. a solid having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. |
| TRIHEDRON | • trihedron n. (Mathematics) A geometric figure composed of three planes meeting at a single vertex. • TRIHEDRON n. a solid figure with three plane surfaces meeting at a point. |