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Cadmium

Podcast 1 · Introduction

Cadmium /ˈkædmiəm/ · noun

A short documentary narration — meaning, origin, and how the word is used.

In this course, cadmium is a soft, toxic bluish-white metal with atomic number 48. The related entry for zinc gives a related word, and the Cambridge definition of cadmium and the Merriam-Webster entry for cadmium give the main sense. For more background, see the encyclopaedia article on cadmium.

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Podcast 2 · Daily Use

In Conversation

Two British speakers using "cadmium" naturally in everyday talk.

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Podcast 3 · Prompt Engineering

Prompting with "cadmium"

An instructor and developer explore real, copy-ready AI prompts built around the word.

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Transcript: “Cadmium” vocabulary micro-course

Read along with the three podcasts, or open the full dictionary entry for Cadmium for the definition, Arabic meaning, synonyms and example sentences.

Podcast 1 — Introduction & meaning

Narrator: Today's word is "Cadmium" — noun, pronounced /ˈkædmiəm/, with the stress on "kad".

Narrator: Cadmium is a soft, bluish-white, toxic metal with atomic number 48.

Narrator: In plain English, cadmium is a metal used in batteries and bright paints, but it is poisonous.

Narrator: It comes from the Latin cadmia, an old name for zinc ore, where it was found.

Narrator: "Nickel-cadmium batteries" describes older rechargeable cells.

Narrator: It differs from zinc because cadmium is far more toxic, whereas zinc is an essential nutrient.

Narrator: "Cadmium yellow" is a second pattern, a bright artist's pigment.

Narrator: Batteries, paint, solar panels, electroplating and environmental science all rely on cadmium.

Narrator: So remember: cadmium is a useful but toxic metal.

Read podcasts 2 and 3

Podcast 2 — In conversation

Speaker A: What is cadmium?

Speaker B: A toxic metal! CADMIUM comes from the Latin cadmia, an old name for zinc ore.

Speaker A: Is it still used?

Speaker B: Yes, but less — its toxicity limits many uses!

Speaker A: Example sentences?

Speaker B: "The battery was nickel-cadmium"; "She painted with cadmium red"; "Cadmium pollutes rivers" — device, art and environment.

Speaker A: Common mistakes?

Speaker B: Don't throw cadmium batteries in household rubbish, because they must be recycled safely.

Speaker A: Close relatives?

Speaker B: 'Zinc' the safe cousin, 'mercury' the toxic twin, 'lead' the heavy alternative. The word keeps its bright-paint charm!

Podcast 3 — Prompt engineering

Speaker B: Let's use "Cadmium" in AI prompts — useful for recycling apps and environmental data.

Speaker A: So a prompt could frame recycling?

Speaker B: Right. For a recycling app, you'd write:

Prompt: Tell the user where to recycle nickel-cadmium batteries and why it matters.

Speaker A: How about pollution?

Speaker B: Ask the model to build:

Prompt: Build a dashboard showing cadmium levels in river samples against safe limits.

Speaker A: Could it help with art?

Speaker B: Yes, you can frame alternatives:

Prompt: Suggest safe alternatives to cadmium yellow for a school art kit.

Speaker A: One more?

Speaker B: For data, try this:

Prompt: Create a periodic table card for cadmium with symbol, uses and a toxicity note.