Lewis & Short

bŏa (also bŏva in the MSS. of Pliny and Festus), ae, f. [bos; cf. βουβών],

  1. I. a large Italian serpent: in Italiă appellatae bovae in tantam amplitudinem exeuntes ut divo Claudio principe occisae in Vaticano solidus in alvo spectatus infans, Plin. 8, 14, 14, § 37; 30, 14, 47, § 138 sq.; Sol. 2; acc. to Paul. ex Fest. p. 30 Müll., a water-serpent, so called because it milked cows, Sol. 2, 33; or because it could swallow an ox, quas boas vocant, ab eo quod tam grandes sint ut boves gluttire soleant, Hier. Vit. Hil. Erem. 39.
  2. II. A disease producing red pustules, the measles or small-pox, Plin. 24, 8, 35, § 53: boam id est rubentes papulas. id. 26, 11, 73, § 120: boas fimum bubulum abolet: unde et nomen traxere, id. 28, 18, 75, § 244; Lucil. ap. Fest. s. v. tama, p. 360 Müll.
  3. III. Crurum quoque tumor viae labore collectus bova appellatur, Paul. ex Fest. p. 30 Müll. (the same author explains with these words the disease tama).

1. bova, v. boa.

2. bova, ae, f., a swelling of the legs: crurum tumor viae labore collectus bova appellatur, Fest. p. 25.