diatom
(noun) microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
Source: WordNet® 3.1
diatom (plural diatoms)
Any of a group of minute unicellular algae having a siliceous covering of great delicacy, now categorized as class Diatomophyceae or division Bacillariophyta.
• Tomida
Source: Wiktionary
Di"a*tom, n. Etym: [Gr. Diatomous.]
1. (Bot.)
Definition: One of the Diatomaceæ, a family of minute unicellular Algæ having a siliceous covering of great delicacy, each individual multiplying by spontaneous division. By some authors diatoms are called Bacillariæ, but this word is not in general use.
2. A particle or atom endowed with the vital principle. The individual is nothing. He is no more than the diatom, the bit of protoplasm. Mrs. E. Lynn Linton.
Source: Webster’s Unabridged Dictionary 1913 Edition
27 May 2025
(noun) the property of being directional or maintaining a direction; “the directionality of written English is from left to right”
The earliest credible evidence of coffee-drinking as the modern beverage appeared in modern-day Yemen. In the middle of the 15th century in Sufi shrines where coffee seeds were first roasted and brewed for drinking. The Yemenis procured the coffee beans from the Ethiopian Highlands.
