Prosthesis, pros′the-sis, n. addition, affixion, as of letters at the beginning of a word: the fitting of artificial parts to the body.—adj. Prosthet′ic. [Gr.]

Prostitute, pros′ti-tūt, v.t. to expose for sale for bad ends: to sell to lewdness: to devote to any improper purpose.—adj. openly devoted to lewdness: sold to wickedness.—n. a female who indulges in lewdness, esp. for hire, a whore: a base hireling.—ns. Prostitū′tion, the act or practice of prostituting: lewdness for hire: the being devoted to infamous purposes; Pros′titūtor, one who prostitutes either himself or another. [L. prostituĕre, -ūtumpro, before, statuĕre, to place.]

Prostrate, pros′trāt, adj. thrown forwards on the ground: lying at length: lying at mercy: bent in adoration.—v.t. to throw forwards on the ground: to lay flat: to overthrow: to sink totally: to bow in humble reverence.—n. Prostrā′tion, act of throwing down or laying flat: act of falling down in adoration: dejection: complete loss of strength. [L. pro, forwards, sternĕre, stratum, to strew.]

Prostyle, prō′stīl, adj. (archit.) having a range of detached columns in front.

Prosy. See Prose.

Prosyllogism, prō-sil′ō-jizm, n. a syllogism of which the conclusion is the premise of another.

Protactic, prō-tak′tik, adj. placed at the beginning, introductory.

Protagonist, prō-tag′on-ist, n. a leading character, esp. in a play.—n. Prō′tagon, a nitrogenous substance obtained from the brain and other tissues. [Gr. prōtos, first, agōnistēs, a combatant.]

Protamœba, prō-ta-mē′ba, n. a low form of the Monera, which is constantly changing its form by sending out and withdrawing pseudopodia.

Pro tanto, prō tan′to, for so much: to a certain extent: to the extent mentioned.