[pen-tok-sahyd] /pɛnˈtɒk saɪd/
an oxide containing five atoms of oxygen, as phosphorus pentoxide, P 2 O 5 .
an oxide of an element with five atoms of oxygen per molecule
pentoxifylline pen·tox·if·yl·line (pěn’tŏk-sĭf’ə-lēn’, -lĭn, pěn-tŏk’sə-fĭl’ēn’, -ĭn) n. A bitter-tasting compound that decreases blood viscosity and improves blood flow, used in the treatment of intermittent claudication.
[pent] /pɛnt/ noun 1. (def 4). /pɛnt/ verb 1. a past tense and past participle of pen2 adj. “kept in, confined,” 1540s, variant of penned, past participle of pen (v.2). Pent-up (also pent up) is from 1580s.
[pent-stee-muh n, pent-stuh-] /pɛntˈsti mən, ˈpɛnt stə-/ noun 1. . /pɛntˈstiːmən/ noun 1. any scrophulariaceous plant of the North American genus Penstemon (or Pentstemon), having white, pink, red, blue, or purple flowers with five stamens, one of which is bearded and sterile
[pent-uhp] /ˈpɛntˈʌp/ adjective 1. confined; restrained; not vented or expressed; curbed: pent-up emotions; pent-up rage. adjective (pent up when postpositive) 1. not released; repressed: pent-up emotions 2. kept unwillingly: I’ve been pent up in this office for over a year