6-letter words containing p, i, r, o
- roping — a strong, thick line or cord, commonly one composed of twisted or braided strands of hemp, flax, or the like, or of wire or other material.
- siprol — Signal Processing Language. A DSP language.
- spinor — a quantity resembling a vector or tensor that is used in physics to represent the spins of fermions.
- spiro- — indicating breath or respiration
- torpid — inactive or sluggish.
- tripod — a stool, table, pedestal, etc., with three legs.
- tripos — (at Cambridge University, England) any of various final honors examinations.
- trophi — the mandibles or other parts of an insect's mouth
- tropic — Geography. either of two corresponding parallels of latitude on the terrestrial globe, one (tropic of Cancer) about 23½° N, and the other (tropic of Capricorn) about 23½° S of the equator, being the boundaries of the Torrid Zone. the tropics, the regions lying between and near these parallels of latitude; the Torrid Zone and neighboring regions.
- tropin — a hormone released in the body by a certain gland and which produces a response in other glands, stimulating the release of other hormones