meristem at the apex of a root or shoot.
A meristem at the tip of a plant shoot or root that produces auxin and causes the shoot or root to increase in length. Growth that originates in the apical meristem is called primary growth. In vascular plants, the apical meristem produces three kinds of primary meristems: the protoderm, ground meristem, and procambium. These in turn produce primary tissues. See more at meristem.
- Apical pneumonia
apical pneumonia apical pneumonia n. Variant of apex pneumonia.
- Apical space
apical space apical space n. The space between the alveolar wall and the apex of the root of a tooth, where an alveolar abscess usually has its origin.
of, at, or forming the . Phonetics. (of a speech sound) articulated principally with the aid of the tip of the tongue, as t or d. Phonetics. an apical sound. adjective of, at, or being the apex of or denoting a consonant articulated with the tip of the tongue, such as (t) or (d) adj. […]
apicectomy apicectomy a·pi·cec·to·my (ā’pĭ-sěk’tə-mē, āp’ĭ-) n. The surgical removal of the apex of the petrous part of the temporal bone.