insulin

IPA/ˈɪnsjəlɪn/
KK[ˈɪnsələn]IPA/ˈɪnsəlɪn/

insulin — noun

1. a natural chemical made inside the body that moves sugar out of the bloodstream

1.nounB2
Definition

a natural chemical made inside the body that moves sugar out of the bloodstream and into cells, where it can be used for energy; also, an artificially produced form of this substance that is used as medicine when the pancreas itself does not supply enough

Example

Imran needs to inject insulin every morning to manage his diabetes.

collocation: inject insulin

After a heavy meal, the pancreas releases a burst of insulin into the blood.

collocation: release insulin

Common collocations
  • inject insulin
  • release insulin
  • insulin dose
  • insulin pump
  • insulin resistance
  • produce insulin
  • insulin levels
Synonyms
  • hormone

    much broader category; insulin is one specific type of hormone among many

  • blood-glucose regulator

    descriptive phrase rather than a true synonym; explains the function of insulin

Antonyms
  • glucagon

    raises blood sugar by triggering the liver to release stored glucose, performing the opposite role of insulin

Grammar Patterns

insulin + noun (as modifier)

uncountable — no plural except when referring to types

Common Mistakes

My grandfather takes insulin pills every day.
My grandfather injects insulin every day.
Insulin cannot be taken as an oral pill because digestive enzymes break it down before it reaches the bloodstream; it must be injected or delivered via a pump.

Word family

  • insulin-dependent
    adjectiveC1
  • pre-insulin
    nounC2

Synonym discussion

Sense: noun/1

Insulin, glucagon, and general diabetes medication are terms learners often mix up. Insulin is a hormone made by the pancreas that lowers blood sugar by pushing glucose into cells for energy. Glucagon is the opposite hormone — it raises blood sugar by telling the liver to release stored glucose. While insulin moves sugar into cells, glucagon pulls it back out. 'Diabetes medication' is a broad category that includes many different drugs (such as metformin, sulfonylureas, and SGLT2 inhibitors), which work in various ways to control blood sugar — not just by replacing insulin. For example, a person with type 1 diabetes must inject insulin because their pancreas makes none at all, whereas a person with type 2 diabetes may control their condition with metformin pills and lifestyle changes without ever needing insulin.

glucagon ↗diabetes medicationhormone ↗

Common collocations

Nouns

  • insulin levels
  • insulin therapy
  • insulin resistance
  • insulin injection
  • insulin dose
  • insulin pump

Phrases

  • insulin-dependent diabetes
  • insulin deficiency
  • insulin sensitivity

Prepositions

  • of insulin
  • on insulin

Etymology

LatinEnglish

The word 'insulin' comes from the Latin 'insula' (island) because it is produced in the islets of Langerhans — small cluster-like 'islands' of cells in the pancreas. The '-in' suffix is a standard chemical ending used for naming proteins and other biological substances.