Usa

Usa; Temporal na saklaw: Early Oligocene–Recent PreЄ Є O S D C P T J K Pg N
	Images of a few members of the family Cervidae (counterclockwise from top left): the elk (Cervus canadensis), white-tailed deer (Odocoileus virginianus), grey brocket (Mazama gouazoubira), barasingha (Rucervus duvaucelii), pudú (Genus: Pudu), sika deer (Cervus nippon), red deer (Cervus elaphus), and reindeer (Rangifer tarandus)
Klasipikasyong pang-agham
Dominyo:	Eukaryota
Kaharian:	Animalia
Kalapian:	Chordata
Hati:	Mammalia
Orden:	Artiodactyla
Infraorden:	Pecora
Pamilya:	Cervidae; Goldfuss, 1820
Tipo ng genus
	Cervus; Linnaeus, 1758
Subfamilies
	Capreolinae; Cervinae;
	Combined native range of all species of deer.

Ang usa (Ingles: deer) ay isang uri ng hayop na namumuhay sa bundok at gubat. Venison (Ingles) ang karneng nakakain mula sa usa. Tinatawag na libay (Ingles: doe o hind) ang babaeng usa, samantalang barako naman (Ingles: roebuck o hart) ang lalaking usa.^[2]

Mga sanggunian

↑ 'deer' singular and plural among examples (swine OE swin, deer OE deor, sheep OE sceap, horse OE hors, year OE gear, pound OE pana) -Jespersen, A Modern English Grammar on Historical Principles, Part II SYNTAX (First Volume), Ch.III The Unchanged Plural (p. 49) arrow.latrobe.edu.au accessed 14 November 2020
↑ English, Leo James. Diksyunaryong Tagalog-Ingles, Kongregasyon ng Kabanalbanalang Tagapag-ligtas, Maynila, ipinamamahagi ng National Book Store, may 1583 na mga dahon, ISBN 971-91055-0-X

Ang lathalaing ito ay isang usbong. Makatutulong ka sa Wikipedia sa pagpapalawig nito.

[1] 'deer' singular and plural among examples (swine OE swin, deer OE deor, sheep OE sceap, horse OE hors, year OE gear, pound OE pana) -Jespersen, A Modern English Grammar on Historical Principles, Part II SYNTAX (First Volume), Ch.III The Unchanged Plural (p. 49) arrow.latrobe.edu.au accessed 14 November 2020

[TE-2] English, Leo James. Diksyunaryong Tagalog-Ingles, Kongregasyon ng Kabanalbanalang Tagapag-ligtas, Maynila, ipinamamahagi ng National Book Store, may 1583 na mga dahon, ISBN 971-91055-0-X

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