English-Thai Dictionary
columella
N ส่วน ที่ เป็น ลำ เล็กๆ
Webster's 1913 Dictionary
COLUMELLA
Col `u *mel "la, n. Etym: [L., dim. of columen column. See Column. ]
1. (Bot. ) (a ) An axis to which a carpel of a compound pistil may be attached, as in the case of the geranium; or which is left when a pod opens. (b ) A columnlike axis in the capsule of mosses.
2. (Anat. )
Defn: A term applied to various columnlike parts; as, the columnella, or epipterygoid bone, in the skull of many lizards; the columella of the ear, the bony or cartilaginous rod connecting the tympanic membrane with the internal ear.
3. (Zoöl.) (a ) The upright pillar in the axis of most univalve shells. (b ) The central pillar or axis of the calicles of certain corals.
New American Oxford Dictionary
columella
col u mel la |ˌkäl (y )əˈmelə ˌkɑljəˈmɛlə | ▶noun ( pl. columellae |-ˈmelˌī, -ˈmelē | ) 1 Zoology an ossicle of the middle ear of birds, reptiles, and amphibians. • Anatomy the pillar around which the cochlea spirals. 2 Zoology the axis of a spiral shell. 3 Botany the axis of the spore-producing body of some lower plants. DERIVATIVES col u mel lar |-ˈmelər |adjective ORIGIN late 16th cent.: from Latin, ‘small column. ’
Oxford Dictionary
columella
columella |ˌkɒljʊˈmɛlə | ▶noun ( pl. columellae |-liː | ) 1 Zoology an ossicle (small bone ) of the middle ear of birds, reptiles, and amphibians. • Anatomy the pillar around which the cochlea spirals. 2 Zoology the axis of a spiral shell. 3 Botany the axis of the spore-producing body of some lower plants. DERIVATIVES columellar adjective ORIGIN late 16th cent.: from Latin, ‘small column ’.
The Wordsmith Dictionary