“Anesthesia” or “Anaesthesia”

Language

Anesthesia and anaesthesia are both English terms.

Usage

Anesthesia is predominantly used in 🇺🇸 American (US) English (en-US) while anaesthesia is predominantly used in 🇬🇧 British English (used in UK/AU/NZ) (en-GB).

In terms of actual appearance and usage, here's a breakdown by country, with usage level out of 100 (if available) 👇:

Term	US	UK	India	Philippines	Canada	Australia	Liberia	Ireland	New Zealand	Jamaica	Trinidad & Tobago	Guyana
anesthesia	98	61	64	95	92	53	100	58	51	72	68	100
anaesthesia	2	39	36	5	8	47	0	42	49	28	32	0

• In the United States, there is a preference for "anesthesia" over "anaesthesia" (98 to 2).
• In the United Kingdom, there is a preference for "anesthesia" over "anaesthesia" (61 to 39).
• In India, there is a preference for "anesthesia" over "anaesthesia" (64 to 36).
• In the Philippines, there is a preference for "anesthesia" over "anaesthesia" (95 to 5).
• In Canada, there is a preference for "anesthesia" over "anaesthesia" (92 to 8).
• In Australia, there is a preference for "anesthesia" over "anaesthesia" (53 to 47).
• In Liberia, there is a preference for "anesthesia" over "anaesthesia" (100 to 0).
• In Ireland, there is a preference for "anesthesia" over "anaesthesia" (58 to 42).
• In New Zealand, there is a preference for "anesthesia" over "anaesthesia" (51 to 49).
• In Jamaica, there is a preference for "anesthesia" over "anaesthesia" (72 to 28).
• In Trinidad & Tobago, there is a preference for "anesthesia" over "anaesthesia" (68 to 32).
• In Guyana, there is a preference for "anesthesia" over "anaesthesia" (100 to 0).

Examples

Below, we provide some examples of when to use anesthesia or anaesthesia with sample sentences.

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