About to go out, as in We were on our way out when the phone rang.
Going out of fashion, becoming obsolete, as in Full-size cars are on their way out.
oolemma o·o·lem·ma (ō’ə-lěm’ə) n. See zona pellucida.
[oh-uh-lahyt] /ˈoʊ əˌlaɪt/ noun, Geology. 1. a limestone composed of minute rounded concretions resembling fish roe, in some places altered to ironstone by replacement with iron oxide. /ˈəʊəˌlaɪt/ noun 1. any sedimentary rock, esp limestone, consisting of tiny spherical concentric grains within a fine matrix n. “rock consisting of fine grains of carbonate of lime,” […]
[oh-uh-lith] /ˈoʊ ə lɪθ/ noun, Geology. 1. any of the component concretions of a piece of oolite. /ˈəʊəˌlɪθ/ noun 1. any of the tiny spherical grains of sedimentary rock of which oolite is composed oolith (ō’ə-līt’) A small, round grain consisting of calcium carbonate, silica, or dolomite. Ooliths have concentric layers that form around a […]
[oh-ol-uh-jee] /oʊˈɒl ə dʒi/ noun 1. the branch of ornithology that studies birds’ eggs. /əʊˈɒlədʒɪ/ noun 1. the branch of ornithology concerned with the study of birds’ eggs n. 1823, from oo- + -logy. Related: Oological.