from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Movement of an organism, especially a bacterium, toward or away from air or oxygen.
from The Century Dictionary.
- noun The movement of cells or organisms in relation to a source or supply of air.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Bacteriology) The positive or negative stimulus exerted by oxygen on aërobic and anaërobic bacteria.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology
Movementof an organismeither towards or away from a region of higher oxygencontent.
Sorry, no etymologies found.
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