On"stead (?), n. [Possibly a corruption of homestead.] A single
farmhouse; a steading. [Prov.Eng. & Scot.] Grose. Jamieson.
On"to (?), prep. [On + to. Cf. Into.] On the top of; upon; on. See On
to, under On, prep.
{ 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, henogeny.
On`to*ge*net"ic (?), a. (Biol.) Of or pertaining to ontogenesis; as,
ontogenetic phenomena. -- On`to*ge*net"ic*al*ly (#), adv.
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. Rev.
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.
||O"nus (?), n. [L.] A burden; an obligation.
||Onus probandi (&?;) [L.], obligation to furnish evidence to prove a
||thing; the burden of proof.
On"ward (?), a. 1. Moving in a forward direction; tending toward a
contemplated or desirable end; forward; as, an onward course, progress,
etc.