Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Onion

The onion (Allium cepa L.Tooltip Carl Linnaeus, from Latin cepa), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus Allium. The shallot is a botanical variety of the onion which was classified as a separate species until 2011. The onion's close relatives include garlic, scallion, leek…

History, Culture & Applications

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Onion. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

History

PakistanCentral AsiaEasternWesternWest
30 related topics

In popular culture

Onion JohnniesBretonRoscoffOnionsNew York City
17 related topics

Adverse effects and toxicity

Allergic reactionsDermatitisRhinoconjunctivitisAsthmaAnaphylaxis
26 related topics

Producing onions

NutrientsPhosphorusNitrogenPotashUSDA zones
33 related topics

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Taxonomy and etymology

Description

History

Uses

Composition

Adverse effects and toxicity

Producing onions

Varieties

In popular culture

Sources

  • Doi Doi (identifier)
  • ISBN ISBN (identifier)
  • OCLC OCLC (identifier)
  • S2CID S2CID (identifier)

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Onion

Nodes195
Edges194
Triples165
Avg. degree1.99
Density0.010256
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Onion

Top relations

related to history · 21
Onion → Allium, Ancient Mesopotamian, Asia, BC, Bronze Age Jericho, Central Asia, Chalcolithic Nahal Mishmar, China, Chinese, Domestication, Hebrew Bible, Humans, Iran, Israel, Jean Bottero, Onions, Pakistan, The, The Assyriologist, West
related to In popular culture · 18
Onion → American, Big Apple, Big Onion, Breton, Britain, Brittany, Chicago, Exeter Book, My, New York City, Old English, Onion Johnnies, Roscoff, The, The Big Onion, The Chicago, WBEZ, Wet
related to Taxonomy and etymology · 14
Onion → AlefAllium, Allium, BaileyAllium, Carl Linnaeus, DonAllium, It, LinnaeusAllium, Mansf, Metz, Moench, RegelAllium, Species Plantarum, Synonyms, The
related to Cultivation · 12
Onion → Bulbing, European, Hot, Most, Nitrogen, North African, Onions, Phosphorus, Sandy, Short-day, Southern European, USDA
related to Aggregatum group (var. aggregatum) · 11
Onion → Arizona, Baboquivari Peak Wilderness, Bulbs, I'itoi, Intermediate, Potato, Shallots, The, They, This, Tops
related to Eye irritation · 10
Onion → Cut, Eye, Freshly, Lacrimal, Leaving, LFS, Model, S-oxide, These, This
related to Culinary · 9
Onion → Bermuda, Cévennes, French, Onions, Red, Vidalia, Walla Walla, White, Yellow
related to Pests and diseases · 9
Onion → Acrolepiopsis, Control, Delia, Diseases, Most, Onions, Plants, Shanking, The
related to Production · 9
Onion → Angola, China, In, India, Japan, Mali, Onions, Turkey, United States
related to Description · 8
Onion → As, From, If, In, Modern, New, The, They

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

onions allium cepa var bulbs alef bulb species used may cultivated plants crop known grown leaves cultivars garlic harvested ascalonicum

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Onioncausesdamage to cells which releases enzymes called alliinases0.90text
Onionis abiennial plant but is usually grown as an annual0.90text
Onionis aprolific multiplier onion cultivated in the Baboquivari Peak Wilderness0.90text
Onionis ahybrid species with three sets of chromosomes0.90text
Allium tricoccum readily availableinstance ofThey found close relatives0.80text
widely used in Native American gastronomyinstance ofThey found close relatives0.80text
a ploughman's lunch.Other usesOnions have particularly large cells that are easy to observe under low magnificationinstance ofOnions pickled in vinegar are eaten as a side serving with traditional pub food0.80text
a ploughman's lunchinstance ofOnions pickled in vinegar are eaten as a side serving with traditional pub food0.80text
cadmiuminstance ofand guinea pigs.Onions can accumulate heavy metals0.80text
leadinstance ofand guinea pigs.Onions can accumulate heavy metals0.80text
particularly when cultivated in contaminated soilsinstance ofand guinea pigs.Onions can accumulate heavy metals0.80text
Onionhas effectSome0.60section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.