9-Letter Words Starting: PERI

• the bodily fluid that fills the space between the bony labyrinth and the membranous labyrinth of the inner ear

• the outside boundary or surface of something

• The cell body of a neuron or of an odontoblast.

• In a plant root, the cylinder of plant tissue between the endodermis and phloem.

• The measurement of a perimeter.

• The systematic measurement of light sensitivity in the visual field by the detection of the presence of test targets on a defined background.

• an optical instrument that provides a view of an otherwise obstructed field