pho|tot|o|nus

pho|tot|o|nus
pho|tot|o|nus «foh TOT uh nuhs», noun.
1. the normal condition of sensitiveness to light, as in leaves, maintained by regular exposure to light, as opposed to the rigidity induced by long exposure to darkness.
2. the irritability exhibited by protoplasm when exposed to light of a certain intensity.
[< New Latin phototonus < Greek phôs, phōtós light1 + tónos tension]

Useful english dictionary. 2012.

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  • tot — ami·tot·ic; ar·is·tot·le s; as·ymp·tot·ic; ath·e·tot·ic; au·tot·o·mize; au·tot·o·my; bathy·pi·tot·me·ter; blas·tot·o·my; cha·tot; col·le·tot·ri·chum; cy·tot·ro·pism; eryth·ro·blas·tot·ic; ex·os·tot·ic; hap·tot·ro·pism; his·tot·ro·pism;… …   English syllables

  • nus — ac·i·nus; ac·ti·no·cri·nus; aero·si·nus·i·tis; ag·as·siz·o·cri·nus; ag·nus; al·nus; alum·nus; an·elec·trot·o·nus; an·nus; ant·echi·nus; an·thre·nus; an·to·nin·i·a·nus; aph·e·li·nus; ar·gu·si·a·nus; bal·a·nus; ba·nus; ba·toc·ri·nus; bo·di·a·nus;… …   English syllables

  • phototonus — pho·tot·o·nus …   English syllables

  • phototonus — pho·tot·o·nus (fo totґə nəs) [photo + tonus] the sensitivity of an organism to light …   Medical dictionary

  • o — abi·o·log·i·cal; ab·o·li·tion; ab·o·li·tion·ary; ab·o·li·tion·dom; ab·o·li·tion·ism; ab·o·li·tion·ist; ab·o·li·tion·ize; ab·o·ma·sal; ab·o·ma·sum; ac·an·thol·o·gy; ac·an·thop·o·dous; acar·i·dol·o·gist; ac·a·ri·nol·o·gy; acar·i·o·sis;… …   English syllables

  • Phototonic — Phototonus Pho*tot o*nus, n. [NL. See {Photo }, and {Tone}.] 1. (Bot.) A motile condition in plants resulting from exposure to light. {Pho to*ton ic}, a. [1913 Webster] 2. (Physiol.) An irritable condition of protoplasm, resulting in movement,… …   The Collaborative International Dictionary of English

  • Phototonic — Phototonus Pho*tot o*nus, n. [NL. See {Photo }, and {Tone}.] 1. (Bot.) A motile condition in plants resulting from exposure to light. {Pho to*ton ic}, a. [1913 Webster] 2. (Physiol.) An irritable condition of protoplasm, resulting in movement,… …   The Collaborative International Dictionary of English

  • Phototonus — Pho*tot o*nus, n. [NL. See {Photo }, and {Tone}.] 1. (Bot.) A motile condition in plants resulting from exposure to light. {Pho to*ton ic}, a. [1913 Webster] 2. (Physiol.) An irritable condition of protoplasm, resulting in movement, due to a… …   The Collaborative International Dictionary of English

  • a — acar·a·pis; ac·a·ri·a·sis; ac·a·ri·a·sis; ac·a·ri·na; ac·a·ri·nar·i·um; ac·a·rine; ac·a·ri·nol·o·gy; ac·a·ri·no·sis; ac·a·ro·ce·cid·i·um; ac·a·roid; ac·a·rol·o·gist; ac·a·rol·o·gy; ac·a·ro·pho·bia; ac·a·rus; acat·a·lep·sy; acat·a·lex·is;… …   English syllables

  • -dac·ty·lous; — ab·i·e·tate; ab·i·e·tene; abio·gen·e·sis; abi·og·e·nist; abra·si·om·e·ter; ab·sorp·ti·om·e·ter; aca·cat·e·chin; ac·ac·e·tin; acad·e·mist; acad·e·my; ac·cel·er·om·e·ter; ac·e·tab·u·lar; ac·e·tab·u·lar·ia; ac·e·tab·u·late; ac·e·tab·u·lif·era;… …   English syllables

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