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Optical axis of lens/principal axis Straight line passing through the geometrical
center of a lens and two centers of curvature
Optical center of lens Central point of the lens through which a ray of light passes
without suffering any deviation
Organic Compound containing carbon and hydrogen
Orphan site (in the context of solid waste) Site contaminated by hazardous waste
with no responsible party can be identified
Orthopedics Specialization of medical science concerned with the correction of
deformities of bones/muscles
Osmosis Movement of water molecule from less concentration to higher concentration region
Otorhinolaryngology Specialization of medicine which is concerned with of diseases of the ear, nose, and throat
Ozone (O3) Gas with three oxygen atom
Pediatrics Branch of medical science dealing with children and their diseases
Parallel force Forces whose lines of action of forces are parallel to each other
Parasitism Interaction between organisms in which one organism benefits and
other is harmed
Particulate matter Solid/liquid substance with size greater than a molecule but
less than microscopic/submicroscopic size (about 500 μm)
Particulates Particles with size more than molecule and less than 500 mm
Pathogenesis Manner of development of a disease
Pathogenic Capable of causing disease
Pathogens Microorganism that have ability to causing sickness
Pathology Specialization of medical science that deals with cause, origin as well
as nature of disease
Penal law Legislation that prohibits acts and imposes penalties for the violations
of those acts
Penalty Punishment imposed as the consequence for violation of law
Percolate To trickle through a permeable material
Percutaneous Through the skin
Perfect fluid Fluid with zero viscosity
Perinatal Pertaining to the period immediately before and after birth
Period of wave Time taken for the oscillation to repeat itself
Pest An organism that is harmful to environment or health
Phagocytosis Membrane engulfs solid particles from surroundings
Pharmacology Specialization of medical science that is concerned with the uses,
effects, as well as modes of action of medicines
Physiology Specialty of medical science that deals with the functions of living
beings and their parts
Phytoplankton The plant forms of plankton
Pili Small hairlike outgrowths present in many species of bacteria that assist in
attaching to other cells/surfaces
Pilot program A trial run of project/equipment/structure on a small scale
Pinocytosis Engulfment of liquid droplets by membrane from surroundings
Glossary
Optical axis of lens/principal axis Straight line passing through the geometrical
center of a lens and two centers of curvature
Optical center of lens Central point of the lens through which a ray of light passes
without suffering any deviation
Organic Compound containing carbon and hydrogen
Orphan site (in the context of solid waste) Site contaminated by hazardous waste
with no responsible party can be identified
Orthopedics Specialization of medical science concerned with the correction of
deformities of bones/muscles
Osmosis Movement of water molecule from less concentration to higher concentration region
Otorhinolaryngology Specialization of medicine which is concerned with of diseases of the ear, nose, and throat
Ozone (O3) Gas with three oxygen atom
Pediatrics Branch of medical science dealing with children and their diseases
Parallel force Forces whose lines of action of forces are parallel to each other
Parasitism Interaction between organisms in which one organism benefits and
other is harmed
Particulate matter Solid/liquid substance with size greater than a molecule but
less than microscopic/submicroscopic size (about 500 μm)
Particulates Particles with size more than molecule and less than 500 mm
Pathogenesis Manner of development of a disease
Pathogenic Capable of causing disease
Pathogens Microorganism that have ability to causing sickness
Pathology Specialization of medical science that deals with cause, origin as well
as nature of disease
Penal law Legislation that prohibits acts and imposes penalties for the violations
of those acts
Penalty Punishment imposed as the consequence for violation of law
Percolate To trickle through a permeable material
Percutaneous Through the skin
Perfect fluid Fluid with zero viscosity
Perinatal Pertaining to the period immediately before and after birth
Period of wave Time taken for the oscillation to repeat itself
Pest An organism that is harmful to environment or health
Phagocytosis Membrane engulfs solid particles from surroundings
Pharmacology Specialization of medical science that is concerned with the uses,
effects, as well as modes of action of medicines
Physiology Specialty of medical science that deals with the functions of living
beings and their parts
Phytoplankton The plant forms of plankton
Pili Small hairlike outgrowths present in many species of bacteria that assist in
attaching to other cells/surfaces
Pilot program A trial run of project/equipment/structure on a small scale
Pinocytosis Engulfment of liquid droplets by membrane from surroundings
Glossary