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, from the Latin apex
) meaning to be at the apex or tip, may refer to:
- Apical (anatomy), an anatomical term of location for features associated with the base of an organism or structure
- Apical consonant
An apical consonant is a phone produced by obstructing the air passage with the apex of the tongue . This contrasts with laminal consonants, which are produced by creating an obstruction with the blade of the tongue .This is not a very common distinction, and typically applied only to fricatives...
, a consonant produced with the tip of the tongue
- Apical dendrite
An apical dendrite is a dendrite that emerges from the apex of a pyramidal cell. Apical dendrites are one of two primary categories of dendrites, and they distinguish the pyramidal cells from spiny stellate cells in the cortices. Pyramidal cells are found in the prefrontal cortex, the hippocampus,...
, a type of dendrite found on pyramidal neurons
- Apical dominance
In plant physiology, apical dominance is the phenomenon whereby the main central stem of the plant is dominant over other side stems; on a branch the main stem of the branch is further dominant over its own side branchlets....
- Apical membrane, a cell biology term
- Apical pulse, the heart rate
Heart rate is the number of heartbeats per unit of time, typically expressed as beats per minute . Heart rate can vary as the body's need to absorb oxygen and excrete carbon dioxide changes, such as during exercise or sleep....
when measured with a stethoscope placed over the heart
- Apical direction, a term used in reference to a tooth
- Apical (chemistry), a position in certain molecular geometries in chemistry.
- Apical whorls of the shells of gastropods or snails, the whorls at the tip of the spire, near the apex (mollusc)
Apex is an anatomical term for the tip of the mollusc shell of a gastropod, scaphopod, or cephalopod mollusc.-Gastropods:The word "apex" is most often used to mean the tip of the spire of the shell of a gastropod...
- Tip of a seed, from which the epicotyl
In plant physiology, the epicotyl is the embryonic shoot above the cotyledons. In most plants the epicotyl will eventually develop into the leaves of the plant. In dicots, the hypocotyl is what appears to be the base stem under the spent withered cotyledons, and the shoot just above that is the...