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n. pl. fo·ram·i·na (-răm′ə-nə) or fo·ra·mens
An opening or orifice, as in a bone or in the covering of the ovule of a plant.

[Latin forāmen, an opening, from forāre, to bore.]

fo·ram′i·nal (-răm′ə-nəl), fo·ram′i·nous (-nəs) adj.


n, pl -ramina (-ˈræmɪnə) or -ramens
(Anatomy) a natural hole, esp one in a bone through which nerves and blood vessels pass
[C17: from Latin, from forāre to bore, pierce]
foraminal adj


(fəˈreɪ mən)

n., pl. -ra•mens, -ram•i•na (-ˈræm ə nə)
a small opening, orifice, or perforation, as in a bone or in the ovule of a plant.
[1665–75; < Latin forāmen hole, opening =forā(re) to bore1, pierce + -men resultative n. suffix]
fo•ram•i•nal (fəˈræm ə nl) adj.


A hole in a bone or between two body cavities.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.foramen - a natural opening or perforation through a bone or a membranous structureforamen - a natural opening or perforation through a bone or a membranous structure
foramen of Monro, interventricular foramen, Monro's foramen - the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere
foramen magnum - the large opening at the base of the cranium through which the spinal cord passes
opening, gap - an open or empty space in or between things; "there was a small opening between the trees"; "the explosion made a gap in the wall"
References in periodicals archive ?
Caption: Figure 2--Illustration of the infraorbital foramen approach (IO) for injection of methylene blue dye over the maxillary nerve in the head of a cat cadaver (lateral view).
The ION exits the orbit through the infraorbital foramen (IOF) where it becomes a terminal branch, dividing into three branches that provide sensory innervations to the upper lip (superior labial nerve), lateral side of the nose (lateral nasal nerve), and lower eyelid (inferior palpebral nerve).
It emerges from the infraorbital foramen, extends to the subcutaneous layer, and is accompanied by the infraorbital vessels deep to the levator labii superioris muscle and malar fat.
Supraorbital notch/foramen, infraorbital foramen and mental foramen in thais: anthropometric measurements and surgical relevance.
After identifying the location of infraorbital foramen on the patient's face using thumb nail, a 22-gauge needle was forwarded down to the point where it touched the periost.
We measured the angle between the line crossing the bilateral infraorbital foramen (LBIF) and the implantation route ([angle][alpha]), the position between the implantation route and the maxillary sinus, and the distance between the starting and the end points.
The morphology of CS is rarely discussed in the literature and so few studies describe the length of this anatomical variation, extending about 55 mm through the maxilla, and vertical distance between the infraorbital foramen and CS may range from 0 to 9.0 mm [6].
The needle was directed supralaterally towards the infraorbital foramen about 5 mm below the margin of the infraorbital rim, and 1-1.5 ml of solution was injected around the infraorbital foramen (not within the foramen, in an attempt to avoid nerve damage or intraneural injection).
The infraorbital foramen lies bilaterally in the maxillary bone, below the edge of orbital cavity.
The infraorbital foramen was single on either side which was located directly dorsally to the junction of the first and second upper premolar in Markhoz goat breed (Figure 2).