Tarsalis is a scientific term referring to a specific muscle group in birds and rodents. Its pronunciation is ˈtɑr.sə.lɪs. The word begins with the voiceless dental fricative /θ/ (as in ‘thick’) followed by the open-mid back unrounded vowel /ɑ/ (as in ‘father’). The last syllable ends with the voiced alveolar fricative /z/ (as in ‘zoo’) and the suffix -alis pronounced as /ə.lɪs/. The spelling of tarsalis reflects the Latin origin of the term, where "tarsus" refers to the ankle or foot bones.
Tarsalis is a term that has multiple meanings depending on the context in which it is used. It can refer to a muscular layer located in the upper eyelid, as well as to a species of mosquito, particularly the Culex tarsalis mosquito.
In the anatomical context, the term tarsalis is used to describe the muscle layer found within the upper eyelid. This layer consists of smooth muscles that control the movement and positioning of the eyelid. It plays a crucial role in the opening and closing of the eye and helps protect the eyeball.
On the other hand, tarsalis is also the name given to a species of mosquito called Culex tarsalis. This species is commonly found in North America and is known for its role in transmitting various diseases, most notably the West Nile virus. The Culex tarsalis mosquito typically breeds in stagnant water sources and is mostly active during the warm summer months.
In summary, tarsalis refers to either the muscular layer within the upper eyelid or a species of mosquito known as Culex tarsalis. These definitions demonstrate the various interpretations and contexts in which the term can be applied.
Musculus tarsalis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The term "tarsalis" has its etymology rooted in Latin. It is derived from the Latin word "tarsus", which refers to the flat surface at the back of the eyelid, containing the meibomian glands. In turn, "tarsus" originates from the Greek word "tarsos", denoting a flat surface or a tablet. Thus, "tarsalis" specifically refers to something related to the tarsus or the eyelid's inner surface.