ONCIDIUM
On*cid"i*um, n. Etym: [NL.] (Bot.)
Defn: A genus of tropical orchidaceous plants, the flower of one species of which (O. Papilio) resembles a butterfly.
ONCOGRAPH
On"co*graph, n. Etym: [Gr. -graph.] (Physiol.)
Defn: An instrument for registering the changes observable with an oncometer.
ONCOMETER
On*com"e*ter, n. Etym: [Gr. -meter.] (Physiol.)
Defn: An instrument for measuring the variations in size of the internal organs of the body, as the kidney, spleen, etc.
ONCOST
On"cost`, n. (Accounting)
Defn: In cost accounting, expenditure which is involved in the process of manufacture or the performance of work and which cannot be charged directly to any particular article manufactured or work done (as where different kinds of goods are produced), but must be allocated so that each kind of goods or work shall bear its proper share. [Brit.]
ONCOTOMY
On*cot"o*my, n. Etym: [Gr. oncotomie.] (Surg.)
Defn: The opening of an abscess, or the removal of a tumor, with a cutting instrument. [Written also onkotomy.] Dunglison.