Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

-ella

Genera of bacteria and algae.

[Latin diminutive ending -ella.]

This forms the genus and informal names of a variety of bacteria and algae. Examples include Chlorella (Greek khlōros, green), a single-celled green alga; Legionella (first identified following an outbreak at a meeting of the American Legion), the bacterium which causes legionnaires' disease; Salmonella (Daniel E Salmon, 1850–1914, an American veterinary surgeon), a bacterium that causes food poisoning; Shigella (Kiyoshi Shiga, 1870–1957, Japanese bacteriologist), a bacterium, some kinds of which cause dysentery.

Many other words in -ella occur in English. Some are Latin diminutives: rubella, the medical term for German measles (Latin rubellus, reddish); lamella, a thin layer (Latin lamina, thin plate). Others are plurals of Latin words in -ellum: flagella, cerebella. Another group are Italian diminutives adopted into English: umbrella (Latin umbra, shade; at first it kept off the sun rather than rain); mortadella, a type of sausage (Latin murtatum, seasoned with myrtle berries); villanella, an Italian rustic-style part-song (villano, peasant).

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