Ontogenesis to Open
(On`to*gen"e*sis On*tog"e*ny) n. [See Ontology, and Genesis.] (Biol.) The history of
the individual development of an organism; the history of the evolution of the germ; the development of an
individual organism, in distinction from phylogeny, or evolution of the tribe. Called also henogenesis,
(On`to*ge*net"ic) a. (Biol.) Of or pertaining to ontogenesis; as, ontogenetic phenomena.
(On`to*gen"ic) a. (Biol.) Ontogenetic.
(On`to*log"ic) a. Ontological.
(On`to*log"ic*al) a. [Cf. F. ontologique.] Of or pertaining to ontology.
(On`*to*log"ic*al*ly), adv. In an ontological manner.
(On*tol"o*gist) n. [Cf.F. ontologiste.] One who is versed in or treats of ontology. Edin.
(On*tol"o*gy) n. [Gr. the things which exist (pl.neut. of being, p. pr. of to be) + - logy: cf.F.
ontologie.] That department of the science of metaphysics which investigates and explains the nature
and essential properties and relations of all beings, as such, or the principles and causes of being.
||Onus probandi [L.], obligation to furnish evidence to prove a thing; the burden of proof.
(||O"nus) n. [L.] A burden; an obligation.
1. Moving in a forward direction; tending toward a contemplated or desirable end; forward; as, an onward
course, progress, etc.
2. Advanced in a forward direction or toward an end.
Within a while, Philoxenus came to see how onward the fruits were of his friend's labor.Sir P. Sidney.
(On"ward), adv. Toward a point before or in front; forward; progressively; as, to move onward.
Not one looks backward, onward still he goes.Pope.
(On"ward*ness), n. Progress; advancement.
(On"wards) adv. [See -wards.] Onward.
(On"y) a. Any. [Obs.] Chaucer.
(On"y*cha) n. [NL., from L. onyx, -ychis, onyx, also, a kind of mussel, Gr. . See Onyx.]
1. An ingredient of the Mosaic incense, probably the operculum of some kind of strombus. Ex. xxx.
2. The precious stone called onyx. [R.]
(||O*nych"i*a) n. [NL. See Onyx.] (Med.) (a) A whitlow. (b) An affection of a finger or toe,
attended with ulceration at the base of the nail, and terminating in the destruction of the nail.