a stout, spiny cactus, Pachycereus pecten-aboriginum, of Mexico, having white flowers and bristly fruits sometimes used locally as combs.
Irregular Plural Nouns: People Change, but Aircraft Don’t
Irregular plural nouns are nouns that become plural in a way other than adding -s or -es to the end. It can be tough to remember which nouns are irregular, but here are a few guidelines for how to handle the ones that are. Regular Nouns First off, a noun is a person, place, or thing. Nouns are singular when they represent one item and …
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019