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Useful Abbreviations

Guide to the abbreviations used on the Tocris website

If the item you are looking for is not found on this page, view our pharmacological glossary and peptide nomenclature guide pages for further information.

• Routes of drug administration
• SI prefixes
• Greek letters (lower case)
• Unit Sizes

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Routes of drug administration

Route	Abbreviation	Description

Intracerebroventricular	i.c.v.	Into the ventricles of the brain
Intra-arterial	i.a.	Into the lumen of an artery
Intracerebral	i.c.	Into the brain
Intradermal	i.d.	Into the dermal layer of the skin
Intramuscular	i.m.	Into a skeletal muscle
Intragastric	i.g.	Into the stomach
Intraperitoneal	i.p.	Into the peritoneal cavity
Intrathecal	i.t.	Into the spinal canal
Intravenous	i.v.	Into a vein
Oral	p.o.	By mouth
Subcutaneous	s.c.	Under the skin
Topical	–	Onto the surface, such as the skin or the eye
Systemic	–	In the periphery (not in the CNS)

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SI prefixes

Symbol	Prefix	Factor

T	tera	1012
G	giga	109
M	mega	106
k	kilo	103
m	milli	10-3
μ	micro	10-6
n	nano	10-9
p	pico	10-12

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Greek letters (lower case)

α alpha	γ gamma	ο omicron	σ sigma
β beta	ι iota	ω omega	τ tau
χ chi	κ kappa	φ phi	θ theta
δ delta	λ lambda	π pi	υ upsilon
ε epsilon	μ mu	ψ psi	ξ xi
η eta	ν nu	ρ rho	ζ zeta

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Unit Sizes

μg	Microgram
mg	Milligram
g	Gram
kg	Kilogram
l	Litre
ml	Millilitre

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