This week’s word is substrate.
Pronounced – SUB strait
Meaning – the material or surface layer in which plants grow.
Origin – from the Latin words sub – under and stratum – layer.
Example usage – Many catfish need a fine substrate such as sand rather than a sharp-edged material like some types of gravel.
Trivia – the word was originally “substratum”.
- The Best Substrates for a Saltwater Fish Tank (brighthub.com)