n. plAltrices(Zoöl) Nursers, -- a term applied to those birds whose young are hatched in a very immature and helpless condition, so as to require the care of their parents for some time; -- opposed to præcoces.
Century Dictionary and Cyclopedia
altricesIn ornithology, one of the primary divisions of the class Aves, or birds. In some systems, as that of Bonaparte, it includes those birds which are hatched in a weak and usually naked condition, and require to be fed for some time in the nest by the parents: opposed to Præcoces, or those birds which run about as soon as they are hatched. Not in use as the name of a subclass of Aves, but recognized as a collective term for birds having the above-given characters, as nearly all land-birds, and some water-birds, as the Herodiones and Steganopodes. Nearly equivalent to Sundevall's term Psilopædes or Gymnopædes. Also called Heterophagi.