
Turnip
Edible Definition: the globular, often flattened root of a biennial herb of the mustard family (Brassica rapa var. rapa)
Inedible Definition: a large pocket watch
“I’ll tell you what you might do, Charley. I put my watch up the spout last week. It’s a silver turnip, so I only got fifteen shillings; yours is a Cox and Savary, and it’s gold.”
— Anthony Trollope, The Three Clerks: A Novel, 1860

Rhubarb
Edible Definition: the tart, succulent, usually pink or red petioles of any of a genus (Rheum) of Asian plants of the buckwheat family having large leaves
Inedible Definition: a heated dispute or controversy
Example:
I was astonished at the energy Granddad poured into the game. He truly cared. He sometimes got into rhubarbs with umpires who had a worse view of the game from behind the plate than Grandpa did on Saturday afternoon black-and-white TV.
— Jeff Petersen, The Observer (La Grande, Oregon), 11 Jun. 2010

Cabbage
Edible Definition: a leafy garden plant (Brassica oleracea var. capitata) with a short stem and a dense globular head of usually green leaves that is used as a vegetable
Inedible Definition: money, cash
Example:
Michael Lynn, a professor at Cornell University, has studied tipping habits during a few thousand meals at casual dining restaurants. … Lynn’s ideas may seem obvious or even corny. The research shows, however, that they’re worth some cold, hard cabbage: Tips can increase anywhere from 10 percent to 70 percent.
— Brahm Resnik, The (Phoenix) Arizona Republic, 11 Sept. 2004

Tomato
Edible Definition: the usually large, rounded, edible, pulpy berry of an herb (genus Solanum) of the nightshade family native to South America that is typically red but may be yellow, orange, green, or purplish in color and is eaten raw or cooked as a vegetable
Inedible Definition from our Unabridged Dictionary: woman, girl
Example:
She’s a sad tomato / She’s three miles of bad road / She's her own invention
— R.E.M., “Crush with Eyeliner,” Monster (1994)

Peanuts
Edible Definition: the oily seeds of a low-branching widely cultivated annual herb (Arachis hypogaea) of the legume family with showy yellow flowers
Inedible Definition: a trifling amount
Example:
There are several things I like about this recipe. One is that it costs peanuts. Another is that it's not only delicious but very easy to make. But most of all I like it because it is, as far as I know, original.
— Richard Ehrlich, The Guardian (London), 15 Apr. 1994

Plum
Edible Definition: a globular to oval smooth-skinned edible fruit that is a drupe with oblong seeds of any of various trees and shrubs (genus Prunus) of the rose family
Inedible Definition: something superior or very desirable; especially : something desirable given in return for a favor
Example:
Vic decided to vote against considering him for the job. And now he finds that the person has been hired and given this plum of an office.
— Gloria DeVidas Kirchheimer, “First, Do No Harm,” The Antioch Review, 2010

Lemon
Edible Definition: an acid fruit that is botanically a many-seeded pale yellow oblong berry produced by a small thorny citrus tree (Citrus limon) and that has a rind from which an aromatic oil is extracted
Inedible Definition: something (such as an automobile) that is unsatisfactory or defective
Example:
In Flores, consumers filed a putative class action against a car dealership, alleging the dealership sold them a ‘lemon’ and failed to fully disclose all sale terms.
— National Law Review, 22 Jan. 2013

Carrot
Edible Definition: a usually orange spindle-shaped edible root of a biennial herb (Daucus carota of the family Apiaceae synonym Umbelliferae, the carrot family)
Inedible Definition: a reward or advantage offered especially as an inducement
Example:
Although there is a desperate need for more affordable housing, developers apparently do not make enough money to want to do it, so government has to dangle a carrot to ensure that thriving corporations will thrive even more.
— LZ Granderson, The Los Angeles Times, 13 Feb. 2024