(Latin: within, inside, on the inside)
Borrowed from late Latin intra-; closely related to inter-, "between". The use of intra- is largely a product of modern times, occurring in words of common and technical vocabulary, where once it was generally a term used in science and the academic world.
While some words are borrowings from Medieval and even Late Latin, few if any come from Classical Latin.
2. Within or introduced into the inside of the eyeball.
Intraocular pressure is the pressure within the eye.
Removal of the cataract and insertion of the intraocular lens typically takes about an hour and does not require hospitalization.
The intraocular lens is implanted within the capsule, which provides permanent support for the lens. It is never handled or adjusted, as a contact lens might be.
2. Situated in the parietal region of the brain.
3. Within the wall of an organ.
2. Within a sheath, for example, cerebrospinal fluid that is contained within the dura mater. It also refers to drugs administered into the cerebrospinal fluid bathing the spinal cord and brain.
3. Within either the subarachnoid or the subdural space.
An intrathecal injection (often simply called "intrathecal") refers to an injection into the spinal canal (intrathecal space surrounding the spinal cord), as in a spinal anaesthesia or in chemotherapy. This route is also used for some infections, particularly post-neurosurgical infections.
2. Existing within or entering through a vein or veins.
Intravenous comes from intra-, "within" or "via", and venous, "of the veins". Often in hospitals patients will be given water or nutrients from intravenous drips from plastic bags of liquid connected to a tube going into a person's arm.
It's a way to get needed nutrition and fluid into a person's body without waiting for the digestive system to process it.
Cross references of word families related directly, or indirectly, to: "internal organs, entrails, inside": ent-; enter-; fistul-; incret-; inter-; splanchn-; viscer-.