[ noun ] any specific activity or pursuit
"they avoided all recreational activity"
Used in print(Richard I. McCosh, "Recreation Site Selection"...)
A site which overlooks a harbor or river may offer interest in the activities of boating traffic .
This follows naturally since frontage on an ocean , stream , or lake provides scenic values and opportunities for the very popular recreation activities of bathing , fishing , boating , and other water_sports .(Bonnie Prudden, "The Dancer and the Gymnast"...)
Even if gymnastics are not the ultimate goal , the good tumbler will be a better dancer , a better athlete , and a human_being with a greater margin of safety in any activity .(Jack Kaplan, "The Health Machine Menace: Therapy by...)
By preying on the sick , by playing callously on the hopes of the desperate , by causing the sufferer to delay proper medical_care , these medical ghouls create pain and misery by their very activity .(Handbook of Federal Aids to Communities. U.S. Dep...)
One-day conferences covering some specific phase of business management , also part of the continuing activities of the Small_Business_Administration , aid community economic development programs .
inactivity act occupation use work market game attempt training procedure education behavior aid practice diversion measurement protection support demand search preparation worship variation leadership operation role creation acting presentation control organization turn ceremony waste provision perturbation cinch support ceremony continuance writing concealment location enjoyment dismantling works grouping occupation liveliness burst last solo fun buzz bag release sin timekeeping puncture service energizing wrongdoing domesticity pleasure behavior precession representation sensory_activity space_walk
[ noun ] the state of being active
"his sphere of activity" "he is out of action"
Used in print(Frank Oppenheimer, "Science and Fear-- A Discussion...)
Solar activities could presumably bring long periods of flood or drought .(Francis J. Johnston and John E. Willard, "The...)
The fraction of exchange was determined as the ratio of the counts / minute observed in the carbon_tetrachloride to the counts / minute calculated for the carbon_tetrachloride fractions for equilibrium distribution of the activity between the chlorine and carbon_tetrachloride , empirically determined correction being made for the difference in counting efficiency of * * f in * * f and * * f .(M. Yokoyama et al., "Chemical and serological...)
Anti - A and anti - B activities were determined in fractions from the sera of group A , group B or group O donors by the following tube agglutination methods .
The small amount of insoluble material which precipitated during dialysis was suspended in approximately 5 ml of starting_buffer , centrifuged , resuspended in 2.5 ml of isotonic saline and tested for antibody activity .
These were read at 280 m m in a Beckman model DU spectrophotometer and tested for antibody activity as described above .
[ noun ] (biology) an organic process that takes place in the body
Used in print(Jacob Robbins et al., "The thyroid-stimulating...)
A study of their activity on thyroglobulin has shown that thyroxine is not preferentially released and that the degradation proceeds stepwise with the formation of macromolecular intermediates ( Alpers , Petermann and Rall , 1956 ) .
A microsomal de-iodinase with a pH optimum of around 8 , and requiring reduced triphosphopyridine_nucleotide for activity , has been identified in the thyroid ( Stanbury , 1957 ) .
On_the_other_hand , there are a_few antithyroid drugs of this same general type , such as resorcinol , possessing no reducing activity and possibly acting through formation of a complex with molecular iodine .
Besides the presence of goitrogens in the diet , the level of iodine itself in the diet plays a major role in governing the activity of the thyroid_gland .
In the experimental animal and in man gross deficiency in dietary iodine causes thyroid hyperplasia , hypertrophy and increased thyroid activity ( Money , Rall and Rawson , 1952 ; Stanbury , Brownell , Riggs , Perinetti , Itoiz , and Del_Castillo , 1954 ) .
organic_process reaction breath sexual_activity control crying consumption breathing discharge respiration healing lacrimation festering ablactation overactivity placentation expectoration perspiring anastalsis opsonisation respiration peristalsis phagocytosis lactation hypostasis diaphoresis sleeping pinocytosis psilosis tanning insemination
[ noun ] a process existing in or produced by nature (rather than by the intent of human beings)
"the action of natural forces" "volcanic activity"
process phase_change diffusion aeration chromatography transpiration flow washing distillation absorption sorption release fractionation centrifugation decay desorption flocculation ion_exchange dissolution stiffening soak capture temperature_change softening synergy feedback drift oscillation formation antiredeposition electrophoresis vitrification adiabatic_process organic_process opacification curdling nuclear_reaction geological_process rigidification source sink effervescence magnetization ionization leach induction demagnetization capture acidification convection survival condensation sericulture transduction filtration extraction ignition precession_of_the_equinoxes scattering pair_production fossilization stimulation extinction concretion establishment succession oxygenation saltation inactivation materialisation chemical_process hardening radiation absolute_zero