Pinna
Pronunciation: PIN-uh (plural: PIN-ee)
The visible, cartilaginous outer part of the ear responsible for collecting and directing sound into the ear canal; also called the auricle.
Full Definition
The pinna (plural: pinnae) is the external cartilaginous structure of the ear that acts as a funnel for sound waves, contributing to sound localisation through spectral shaping. In audiology and ENT clinical documents, both 'pinna' and 'auricle' are accepted formal terms; however, editors should ensure consistency within a single document. The plural 'pinnae' is preferred in formal writing over 'pinnas.' Editors must also recognise that pinna morphology is clinically relevant in earmould fitting and hearing aid selection reports, where terms such as 'pinna shadow' and 'pinna gain' may appear. The term should not be confused with 'perineum,' a common transcription error.
Usage
Usage note: Plural is 'pinnae,' not 'pinnas.' Both 'pinna' and 'auricle' are acceptable formal terms; maintain consistency within a document.
In Context
- "The pinna shape was noted as atypical, requiring a custom earmould impression." — Hearing aid fitting notes
- "Use 'pinnae' as the preferred plural form in clinical manuscripts, not 'pinnas.'" — Journal style guide