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Definition of growth spurt, cation, enantiomer, proton, greenhouse gases, division, pituitary gland, ear wax, testicle, keratin

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Definition of growth spurt (noun)
form plural: rowth spurts

a rapid increase in growth which occurs during adolescence

Examples
Children have a growth spurt around puberty.

Definition of growth spurt
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Definition of cation (noun)
form plural: cations

positively charged ions

Examples
An ion that has lost electrons is called a cation.

Definition of cation
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Definition of enantiomer (noun)
form plural: enantiomers

either one of a pair of chemical components whose molecular structures have a mirror-image relationship to each other

Examples
Enantiomers are chiral objects being images which are not overlayed.

Definition of enantiomer
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Definition of proton (noun)
form plural: protons

subatomic particle with one positive charge

Examples
Protons and neutrons are found in the nucleus of the atom.

Definition of proton
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Definition of greenhouse gases (noun)
form: only plural

gases such as carbon dioxide and methane that absorb infrared radiation which warms the atmosphere

Examples
The amount of greenhouse gases in the atmosphere is increasing because of use of fossil fuels and livestock farming.

Definition of greenhouse gases
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Definition of division (noun)
form plural: divisions

the splitting of the whole into parts

Examples
Cell division occurs during mitosis or meiosis.

Definition of division
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Definition of pituitary gland (noun)
form plural: pituitary glands

master endocrine gland which is attached to the hypothalamus at the base of the brain

Examples
The pituitary gland has an anterior and a posterior lobe and produces the hormones ACTH, LH, FSH, TSH, growth hormone, prolactin, MSH, vasopressin and oxytocin.

Definition of pituitary gland
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Definition of ear wax (noun)
form: no plural

substance secreted in the outer ear canal by special glands

Examples
The technical name for earwax is cerumen.

Definition of ear wax
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Definition of testicle (noun)
form plural: testicles

male sex organ found in the scrotum

Examples
The testicle consists of the testis, the vasa efferentia and epididymis.

Definition of testicle
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Definition of keratin (noun)
form: no plural

hard protein found in skin; hair or nails

Examples
Keratin is a tough and fibrous protein.

Definition of keratin
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