| foetal development | Morphologic and physiologic growth and development of the mammalian embryo or foetus. (12 Dec 1998) |
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| land conservation and development commission | (LCDC) A commission appointed to determine land use policy in Oregon. (05 Dec 1998) |
| language development | The gradual expansion in complexity and meaning of symbols and sounds as perceived and interpreted by the individual through a maturational and learning process. Stages in development include babbling, cooing, word imitation with cognition, and use of short sentences. (12 Dec 1998) |
| language development disorders | Failure to understand or speak the language at the expected age. Causal factors include slow maturation, hearing loss, brain injury, mental retardation and emotional disorders. (12 Dec 1998) |