islet

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/ˈaɪlət/
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A very small island, with medical uses for small isolated tissue clusters and figurative uses for tiny separate pockets within a larger whole.
Practice using this word in conversation

Examples

  • Islet biology links endocrinology with diabetes care.
  • At low tide, the sandbar looked more like an islet.
  • A few family shops made an islet of local life among the chains.
  • The old library was an islet of silence near the market.
  • The garden formed a green islet in the middle of the concrete square.

Similar words

cay
motu
pancreatic islet
holm
eyot
key
tissue island
pancreatic
cluster
rock

Meanings

Very small island

noun
geography
neutral
A small island, usually one much smaller than the nearby or better-known islands around it.

Usage

Use islet when small size matters, whether the land lies in the sea, a lake, or a river.

Examples

  • The boat anchored beside a rocky islet off the coast.
  • A narrow channel separated the islet from the larger island.
  • Seabirds nested on the uninhabited islet each spring.
  • The map marked three reefs and one tiny islet near the harbor.
  • They paddled around the lake until they reached a wooded islet.
  • At low tide, the sandbar looked more like an islet.
  • The lighthouse stood on a bare islet beyond the bay.

Common mistakes

Large islands are mislabeled as islets just because they are surrounded by water.
IncorrectCorrect
Crete is a Greek islet in the Mediterranean. Crete is a Greek island in the Mediterranean.
The islet had several large cities and an international airport. The island had several large cities and an international airport.
We crossed the islet by bridge from the mainland. We crossed to the island by bridge from the mainland.

Similar words

cay
key
ait
eyot
holm
motu
skerry
rock

Small tissue mass

noun
medical
technical
A small isolated mass of tissue within a different tissue, especially one of the hormone-producing clusters in the pancreas.

Usage

Use islet in medical writing for a distinct cell cluster, most often a pancreatic islet or an islet of Langerhans.

Examples

  • Each pancreatic islet contains hormone-producing cells.
  • The study measured insulin release from a single islet.
  • Researchers counted the islets visible in the stained tissue.
  • An islet of Langerhans is embedded in the pancreas.
  • Damage to beta cells inside the islet can affect blood sugar.
  • The transplant used donor pancreatic islets rather than a whole pancreas.
  • The microscope slide showed a pale islet among darker pancreatic tissue.

Common mistakes

The medical sense is treated as a whole organ rather than a small tissue cluster.
IncorrectCorrect
The islet produces digestive enzymes for the intestine. The pancreas produces digestive enzymes for the intestine.
A pancreatic islet is the same size as the pancreas. A pancreatic islet is a small cluster within the pancreas.
The surgeon removed the entire islet organ. The surgeon transplanted pancreatic islets.

Similar words

pancreatic islet
islet of Langerhans
cell cluster
tissue island

Relating to pancreatic islets

adjective
medical
technical
Connected with the small hormone-producing cell clusters of the pancreas.

Usage

Use islet before medical nouns such as cells, function, transplantation, or autoantibodies.

Examples

  • Islet cells help regulate blood sugar.
  • The hospital expanded its islet transplantation program.
  • Researchers tracked islet function after treatment.
  • The test looked for islet autoantibodies.
  • A rare islet cell tumor changed her hormone levels.
  • Islet biology links endocrinology with diabetes care.
  • The review compared several islet isolation methods.

Common mistakes

The adjective is confused with the noun or with the similar-looking word eyelet.
IncorrectCorrect
The trial studied islet in people with diabetes. The trial studied islet transplantation in people with diabetes.
The lab measured eyelet cell function. The lab measured islet cell function.
The report described islet as a new medication. The report described islet autoantibodies as a marker.

Similar words

pancreatic
endocrine
islet-cell

Small isolated pocket

noun
figurative
neutral
A small, separate area or group that stands apart from what surrounds it.

Usage

Use islet figuratively when the image of a tiny island helps show isolation inside a larger setting.

Examples

  • The garden formed a green islet in the middle of the concrete square.
  • A small islet of calm survived in the noisy office.
  • The old library was an islet of silence near the market.
  • Their language remained an islet inside the larger culture.
  • The policy created an islet of protection in a harsh system.
  • A few family shops made an islet of local life among the chains.
  • The archive became an islet of memory after the town changed.

Common mistakes

The figurative sense is used for any small part, even when isolation is not part of the idea.
IncorrectCorrect
The first chapter is an islet of the book. The first chapter is a section of the book.
The city center is an islet that covers half the region. The city center is a large district that covers half the region.
The café formed an islet because it was popular. The café formed a quiet islet in the busy station.

Similar words

pocket
enclave
oasis
corner
patch
cluster

Usage

Use the geographic sense for small landforms, the medical sense for pancreatic or other tissue clusters, and the figurative sense only when isolation is central.

Common mistakes

Islet is not just a fancy word for any island, and islet cell belongs to anatomy rather than geography.

Etymology

From Middle French islette, a diminutive of isle, ultimately from Latin insula, meaning island.

FAQ

What is an islet?

An islet is a very small island, often much smaller than nearby islands.

Can an islet be in a lake or river?

Yes. An islet can be a small landform in the sea, a lake, a river, or another body of water.

What is a pancreatic islet?

A pancreatic islet is a small cluster of hormone-producing cells in the pancreas.

What are islets of Langerhans?

Islets of Langerhans are pancreatic islets that contain endocrine cells involved in blood sugar regulation.

Is islet related to island?

Islet comes through French from isle, which ultimately traces to Latin insula. It means a small isle or island.

How is islet pronounced?

Islet is pronounced /ˈaɪlət/, with a silent s.

Can islet be figurative?

Yes. It can describe a tiny isolated pocket, such as an islet of calm in a noisy place.

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