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Organelle
An organelle is a differentiated part contained in cells ...
Organic agriculture
Organic agriculture is a farming method that does not use ...
Organic phosphate group
An organic phosphate group is the group (-PO4-) bound to an ...
Organic Pollution
Organic pollution is a type of chemical pollution caused by ...
Organiser
An organiser is an application for managing personal data ...
Organoleptic
The term organoleptic is used to describe anything which can ...
Orion
The constellation of Orion is a constellation in the winter ...
Orion nebula
The Orion nebula Messier 42 is the brightest diffuse nebula ...
Ornithologist
An ornithologist is a specialist in ornithology.
Ornithology
Ornithology is the science of birds.
Orogeny
Orogeny is the set of events leading to the formation of a ...
Orotic acid
Orotic acid is a nitrogen base belonging to the pyrimidine ...
Orphan disease
An orphan disease is a disease that does not have effective ...
Orphan medicine
An orphan medicine is a substance which may be useful for ...
Orthopaedic appliance
An orthopaedic appliance is a device that supports part of the body.
Orthorhombic system
The Orthorhombic system is the system of which the unit cell ...
Orthosilicate
Orthosilicate is a synonym of neosilicate (q.v.).
Oscillograph
An oscillograph is device for studying the variations with ...
OSD
OSD: On Screen Display. The display of the menu of a DVD ...
OSI Model
OSI (Open system interconnection) is an interconnection ...
Oside
Osides are polymers of monosaccharides formed by ...
Osmolarity
Osmolarity is defined as the number of particles per litre ...
Osmosis
Osmosis is the passage of solvent molecules, generally ...
Osmotic pressure
The osmotic pressure is the pressure that prevents a solvent ...
OSPAR Convention
Adopted in 1992 and applicable since 1998, the Convention ...
Osteoarthritis
Osteoarthritis is wear of cartilage causing joint pain and ...
Osteoblast
An osteoblast is a young cell of mesenchymal origin which ...
Osteoclast
Osteoclasts are derived from the same precursor cells as ...
Osteocyte
An osteocyte is a bone cell. Structure of osteocytes They ...
Osteoporosis
Osteoporosis is a diffuse disease of the skeleton resulting ...
Osteosarcoma
An osteosarcoma is a primary tumour that develops in bone ...
Osterrite
Osterrite is a sedimentary clayey rock, rich in silica and ...
Otherness
Otherness is the recognition of the difference in another. ...
Outcrop
An outcrop is the part of a terrain that is visible on the ...
Outer ear
As its name indicates the outer ear is the outermost part of ...
Ovariectomy
Ovariectomy is surgical removal of one or both ovaries ...
Ovary
The ovaries are part of the female reproductive ...
Oven
An oven is a heated enclosure that is usually used in air ...
Over-packaging
Over-packaging is packaging considered to be excessive as it ...
Overnet
Overnet is a file-sharing application from the creators of ...
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Acutance
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Solar flare
Trojan horse
Giant planet
Chiropraxis
Drainage basin
Anthelminthics
Ephemeral
M38
Liquid laser
Zero day Exploit
Pallasite
Nucleoside triphosphate
Autologous
Cork oak
Glycoprotein
Biocenosis
Mersenne prime
Artificial CO2 sequestering
Reflecting power
Eucalyptus
ASN. 1
ANSI
Container return scheme
Chrysalis
Final waste
Tomato
Gastroscopy
Bolometer
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