| ANCESTRALS | • ANCESTRAL n. a type of relation in logic. |
| ANTIVIRALS | • antivirals n. Plural of antiviral. • ANTIVIRAL n. any drug designed to protect against viral infection. |
| CATHEDRALS | • cathedrals n. Plural of cathedral. • CATHEDRAL n. the principal church in a diocese, so called because in it the bishop has his official chair (cathedra). |
| CHAPARRALS | • chaparrals n. Plural of chaparral. • CHAPARRAL n. (Spanish) a thicket of low evergreen oaks. |
| CONFERRALS | • conferrals n. Plural of conferral. • CONFERRAL n. the act of conferring. |
| EPHEMERALS | • ephemerals n. Plural of ephemeral. • EPHEMERAL n. a creature, such as a mayfly, that lives for one day only. |
| FENESTRALS | • fenestrals n. Plural of fenestral. • FENESTRAL n. a window with some other translucent material instead of glass. |
| INAUGURALS | • inaugurals n. Plural of inaugural. • INAUGURAL n. an inaugural address or lecture. |
| ISOTHERALS | • isotherals n. Plural of isotheral. • ISOTHERAL n. a line connecting points of the same average summer temperature, also ISOTHERE. |
| MAGISTRALS | • magistrals n. Plural of magistral. • MAGISTRAL n. (obsolete) a preparation devised by a physician for a particular case; not included in the standard pharmacopoeia. |
| SINISTRALS | • sinistrals n. Plural of sinistral. • SINISTRAL n. a left-handed person. |
| TRIHEDRALS | • TRIHEDRAL n. a solid having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. |