abbreviation111
a measure of how well a sunscreen will protect skin from UVB (Ultraviolet B) rays, the kind of radiation that causes sunburn, damages skin, and can contribute to skin cancer
SPF (Sun Protection Factor)
SPF, or Sun Protection Factor, is a measure of how much UV radiation it takes to produce sunburn on skin with sunscreen compared to how much UV exposure it takes for unprotected skin to get sunburned.
For example, if it takes 300 seconds for skin to burn with SPF 60 sunscreen, and 10 seconds to burn without it, the SPF is 60 because 300 divided by 10 equals 30. However, this doesn’t mean you can stay in the sun 60 times longer than without sunscreen.
abbreviation
a type of ultraviolet radiation that is responsible for delayed tanning, sunburns, and most skin cancers
UVB (Ultraviolet B)
UVB (Ultraviolet B) is a type of ultraviolet radiation with wavelengths between 280 and 320 nm. Here are some key facts about UVB rays: UVB rays make up only 5% of the UV rays from the sun, but they are very high energy.
noun
a violent attack:
Crime and punishment C1
assault
/əˈsɑːlt/
noun [ C ] CHEMISTRY specialized
a type of chemical commonly used as preservatives in cosmetics, pharmaceutical products, and food, and is known to prevent the growth of harmful bacteria, fungi, and yeast
paraben
/ˈpær.ə.bən/
noun [ C or U ]
a substance that is an important part of skin and connective tissue (= material that supports and connects organs and joints in the body), and that is used in some products and treatments intended to make the skin healthy and attractive:
hyaluronic acid
/ˌhaɪ.ə.ləˌrɑː.nɪk ˈæs.ɪd/
idiom literary
when you were very young
at your mother’s knee
I learnt these songs at my mother’s knee.
adjective (literary)
that cannot be trusted; unable to be trusted, or showing no loyalty:
SYNONYM treacherous
perfidious
/pərˈfɪdiəs/
But lurking among these delightfully sweet fruits is a perfidious predator
adjective
1.extremely painful or bad
2.extremely boring or embarrassing:
3.(of pain) extremely strong:
excruciating
/ɪkˈskruːʃieɪtɪŋ/
NOTE: If something is extremely painful, you can say that it is excruciating or agonizing
noun
insect with long back legs, that can jump very high and that makes a sound with its legs
TOPICS Insects, worms, etc. C2
grasshopper
/ˈɡræshɑːpər/
Idioms
knee-high to a grasshopper
(informal, humorous) very small; very young
noun [ C ]
a large insect found in hot areas that flies in large groups and destroys plants and crops:
TOPICS Insects, worms, etc. C2
locust
/ˈloʊ.kəst/
noun
a brown or black insect that makes short, loud noises by rubbing its wings together
TOPICS Insects, worms, etc. C2
cricket
/ˈkrɪk.ɪt/
verb [intransitive]
TOPICS Discussion and agreement C2
relent
/rɪˈlent/
noun (anatomy)
(in a person or animal, the lower) jawbone
TOPICS Body C2
mandible
/ˈmændɪbl/
grasshopper has razor like mandibles and can kill powerful mantis
adjective
causing you to have fear or respect for something or someone because that thing or person is large, powerful, or difficult:
C2
formidable
/fɔːrˈmɪd.ə.bəl/
NOTE: from Latin formidare ‘to fear’.
adjective
(of people and things) small and pretty in a way that people find attractive
TOPICS Appearance C2
SYNONYM delicate
dainty
(comparative daintier, superlative daintiest)
/ˈdeɪnti/
[ U ] US offensive slang
a man’s outer sexual organs:
junk
/dʒʌŋk/
If a woman wants to see a picture of your junk, Let her ask for it.
“Don’t touch my junk” is a phrase that became popular in the United States in 2010 as a criticism of Transportation Security Administration (TSA) patdowns.
verb [ T ]
to suddenly release a violent force that cannot be controlled:
unleash
/ʌnˈliːʃ/
At worst, nuclear war could be unleashed.
Rachel’s arrival on the scene had unleashed passions in him that he could scarcely control.
verb
to cause or believe race to be an important feature of a group of people, of society, or of a problem:
racialize
/ˈreɪ.ʃə.laɪz/
noun
the amount of an ingredient such as salt, sugar or fat which optimizes deliciousness (in the formulation of food products).
bliss point
/blɪs pɔɪnt/
The food industry goes to great lengths to figure out what makes us crave a product. The exact combination of ingredients it calls the “bliss point”. Source: The Secrets of Sugar. CBC documantary
noun [ C or U ]
any of various types of organisms that get their food from decaying material or other living things:
fungus
plural fungi /ˈfʌŋ.ɡaɪ/ funguses
/ˈfʌŋ.ɡəs/
a species of psychedelic mushroom that contains psilocybin and psilocin, the compounds responsible for its mind-altering effects. It is also known as the magic mushroom, shroom, gold cap, or cube. It is widely distributed in warm and humid regions of the world, and it is easy to cultivate at home
Psilocybe cubensis
Psilocybe cubensis
verb [transitive, intransitive]
stutter
/ˈstʌt̬.ɚ.ɪŋ/
noun
SPECIMEN
/ˈspesɪmən/
idiom old-fashioned
something that you say when it is raining heavily
It’s “raining cats and dogs”
or
“raining dogs and cats”
“I can’t believe it’s raining cats and dogs! My picnic is ruined!”
Mythology: Norse mythology has Odin, the god of storms, associated with dogs and wolves (symbols of wind). Sailors might have linked black cats (witches’ companions) with storms, creating a connection between cats and heavy rain.