Is there a single word for someone who always eats the same food?

E.g. Hard boiled egg for breakfast, tuna fish for lunch, chicken breast for dinner. Every day.

  • 2
    that's not the same food all of the time. That's three entirely different meals.
    – Oldcat
    Jul 11, 2014 at 21:47
  • If you eat nothing but rabbit you'll die of malnutrition because there would be insufficient fat-based vitamins, etc. I'm pretty sure the same applies to bananas, but I can't find a link for that. Jul 12, 2014 at 0:10
  • The giant Panda is ________: it eats only Eucalyptus leaves.
    – GEdgar
    Dec 15, 2017 at 11:00

5 Answers 5


Monophagous (adjective):

feeding on or utilizing a single kind of food; especially : feeding on a single kind of plant or animal

Also what you have described above is a monotonous food schedule.

There is a condition called sitophobia:

Fear of eating due to the unpleasant symptoms (e.g., nausea, vomiting and abdominal pain) that follow eating due to chemotherapy (a feature of chemotherapy-induced anorexia); Unlike anorexia, there is an appetite, but it is curtailed by the anticipated emesis and nausea.

You can use it with selective to form "selective sitophobia."

Source: http://medical-dictionary.thefreedictionary.com

  • 2
    If monophagous sounds too much like monotonous, try monotrog, from Greek τρώγω 'eat; chomp, munch' Jul 11, 2014 at 18:26
  • 1
    Can we use this for people with the same routine of eating? I think this is only used in zoology.
    – ermanen
    Jul 11, 2014 at 18:27
  • 1
    Cool word, but I don't think it quite fits what the O.P. is asking for, except in a humorous context. Monophagous seems to be more of a scientific term, not something that would generally be used to describe an ultra-regular daily diet.
    – J.R.
    Jul 11, 2014 at 18:28
  • 2
    It seems like a fine enough answer to me. But either way, I suppose this is what you get when you put arbitrary restraints on expression (like "I want to express it with a single word!").
    – user28567
    Jul 11, 2014 at 18:47

While it is much broader than diet, and not a single word,the phrase creature of habit describes (according to Cambridge Dictionary Online)

someone who always does the same thing in the same way: My father's such a creature of habit - he always has to have a biscuit and a cup of tea at bedtime

You might say When it comes to meals, he is a creature of habit - the same foods every day.

  • I think this is a better answer than the mono- alternatives, considering that the example person eats eggs, chicken, and tuna everyday. My first thought was the word regular.
    – J.R.
    Jul 12, 2014 at 0:06
  • @J.R. Actually just modified my example to reflect there are multiple foods involved.
    – bib
    Jul 12, 2014 at 0:15
  • It's all a matter of interpretation, of course, and the O.P. has given us little to go on; however, I think creature of habit fits perfectly. The way this man is described, I imagine that, not only does he eat the same foods every day, but he always does so from the same chair, he always cracks his egg open the same way, the tuna is always served on the same toasted wheat bread, etc. Very Phileas Fogg-like: the tea and toast at twenty-three minutes past eight, the shaving-water at thirty-seven minutes past nine...
    – J.R.
    Jul 12, 2014 at 7:53

Single food diet is called monotrophic diet or monodiet (mono diet).

Mono meal (or monotrophic meal) is mentioned as the same meal that you eat in a mono diet (or mono eating).

monotrophic (adj) feeding only on one kind of food

Source: http://www.merriam-webster.com/dictionary/monotrophic

Eating only one food at a meal is known as a monotrophic meal. If all meals over a period of time consist of a single food, such as oranges or grapes or watermelon, this would be called a monotrophic or “mono” diet.

Source: http://www.rawfoodexplained.com/application-of-food-combining-principles/mono-meals-and-mono-diets.html

From the same source above, article mentions your example as a regular diet consisting of monotrophic meals:

I do not endorse the use of a monotrophic diet for extended periods or regularly for several days every week, nor do I endorse the regular or extended use of a diet consisting of all monotrophic meals, i.e., each meal consisting of a single food, e.g., one kind of melon for one meal, grapes for another meal, romaine lettuce for another meal, alfalfa sprouts for another meal.

There is also a colloquial term mono-luncher for the person who eats the same meal.

Here is an article about mono-lunching:


To add the answers already here, stenophagous describes animals that eat a comparatively small variety foods.

Etymology from Wiktionary: Ancient Greek στενός (stenós, “narrow, limited”) + φαγεῖν (phageîn, “to eat”).

Merriam-Webster describes it as especially in regards to insects. Collins describes it as possibly even a single type of food.


How about (coining) monovore?

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